Half-Life: Opposing Force
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Contents 1 Updates 2 Introduction 3 Walkthrough 3.1 Welcome to Black Mesa 3.2 We're pulling out 3.3 Missing in Action 3.4 Friendly Fire 3.5 We're no alone 3.6 Crush Depth 3.7 Vicarious Reality 3.8 Pit Worm's nest 3.9 Foxtrot Uniform 3.10 The Package 3.11 Worlds collide 3.12 The end 4 New monsters 5 Cheats & Tricks 5.1 Easter eggs 5.2 Cheats _________ I Updates ? *** Version 1.0 (27-12-99) This is the first version of this file. Everything has been added. I don't expect to add much more, but if you have some interesting information to add, don't hesitate to mail me. _______________ II Introduction ? Half-Life: Opposing Force is an official expansion pack for Half-Life being developed by Gearbox Software and published by Sierra Studios. In Opposing Force, you play a soldier, Adrian Shephard that is sent to the Black Mesa Research Facility to clean up the mess created by Gordon Freeman. Not only will you see Gordon Freeman sometimes, you'll also often visit the same places he visited, but at another time. The expansion pack was released in November, 1999 in the US and December, 1999 in Europe. Since I live in Europe and I had exams, it took a while before this guide was written, but I finished the expansion pack in one day and wrote the core of this guide the same day. Gearbox did an excellent job on the expansion pack. Although they were under 'very strong surveillance' from Valve and although they hadn't developed anything yet (their game Prax Wars was canned), they created the same intense atmosphere from Half Life and had some nifty ideas themselves in the game. What to think about the puzzle where you have to activate the "Gearbox" and "Valve" ... and the easter egg with the speech of the boss. There's more, but I'll tell you that below. The game's 70% long of the original Half Life and features new weapons, new enemies, new levels, new squad team mates, ... Now who is this Adrian Shephard you're playing with and what does he have to do with the story? Remember the marines who gave you so much trouble in Half-Life? Now you are one of them and life is not so easy as part of the Opposing Force. When Freeman gets out, the powers-that-be who caused you so much hassle in the first instalment resort to Plan B, sending in the Black Ops. As one of your nation's finest fighting specimens, you dive into the world of Black Mesa. As a soldier sent in to eliminate Gordon Freeman, you are separated from your base unit and discover a new alien race amidst the chaos. It's quickly revealed that these highly advanced alien life forms, known only as Race X, descended upon Earth to pillage the planet from the Black Mesa facility when Gordon Freeman transported to the border world of Xen. Just as Gordon discovered when he encountered hostile life forms in Half-Life, if you can't live with them, you'd best live without them. Thus, it's your characters duty as a Black Op to sort out this mess, even though he's quite on his own. I played the game on the medium difficulty and I don't know whether changing the difficulty brings up more enemies, I suspect you only sustain more damage. Anyway, I just walked around and noted everything down I saw. Go on and read the walkthrough now :) _______________ III Walkthrough ? 3.1 Welcome to Black Mesa ? After the truly magnificent intro (look to the background for some scenes from the original Half Life), you awake inside a scientist's room. Talk to the scientist and he'll tell you what's happened. He mentions a radio somewhere outside, it's your first mission objective. Go through the door and turn right. Turn left and go through the double doors. Look through the window, you see some scientists. Turn left and walk to the back. Talk to the scientists there (there's one poking a crab). Walk to the back and get your power vest from the table on the right. Now return and go left, left, right. Look through the window and you see a scientist and a zombie grunt in the same room. The zombie grunt wakes up and kills the scientist. Yikes. Don't near the window, but go to the left. Crawl to the opening in the left of the door and go down the stairs. Talk to the security guard and walk to the door. He'll open it for you. Go through the door and turn right. There's an electrical wire in the middle of the gangway. Don't touch it or you'll get electrical damage. Get the wrench next to the toolbox and walk past the electrical wire. You'll enter a room with two beams. You can crawl under the green beam. You need to go up the stairs, but the purple beam is blocking your path. There's no way to get past it, so read the sign on the wall, it says "optical mirrors are very fragile". Use your wrench to destroy the optical mirror that reflects the beam over the stairs. Go up the stairs then and turn right. Walk forward and the ceiling will cave in. Kill the two headcrabs and turn left. You'll see a green substance on the floor. Near the substance and retreat at once, a headcrab from the left will attack you. Jump across the green pool and jump back then. Another head crab will attack you, but it will kill itself if it touches the pool when following you. Jump across the pool then and turn right. Look through the door to the right. You see that strange man in the suit there, together with a security guard. You can hit the glass to draw their attention, but they won't open the door for you. Smash the grates and you discover a medikit and an energy cell. Go up the stairs and through the door. Smash the crates to find another medikit. Go through the door then and you're outside. Go to the right and jump across the gap. It's not possible to reach the stone slab, you'll land on the grass below the slab. Jump further some more time and jump to the left then, on the small stone slab. From there, you can jump to the building to the left. You saw this place during the intro too. Walk over the body of the alien slave to get a knife. Jump over the gab then and enter the building. Watch out, there's a headcrab inside. You can lure him to jump in the gap, but the falling damage won't kill it. At least, it can't hurt you from there. Go to the back of the building and crouch to enter the small entrance to the right. Follow the tunnel. Walk down the pipes and you enter another place from the intro. You need to get to the area past fence, but some beams are blocking your path. Don't touch the fence, there's some serious voltage. You need to find a way to shut down the power. Walk through the big doors on the right. Kill the headcrab. Watch for the gap in the wall on the right, some more headcrabs will appear. Kill them and exit through the big doors. Walk towards the iron cage and a security guard will near you. Of course, he's foolish enough to touch the fence and kill himself. Destroy the crates for some more medikits. Go through the small entrance between the big door and the cage then. You may need to use your nightvision in here. You'll enter a small room with a fan. There are some electric beams, so make sure not to touch them. Look to the right and wait until the beam disappears. Move forward and wait for the second beam to disappear. Go further and enter the small tunnel. Exit and you're inside the cage. There are more beams here. Carefully move to the right and then forward. Make sure not to touch the fence. Grab the gun (the .357 Desert Eagle, but I'll call it the magnum from now on) and crouch to the right below the beam. Go right then and you see the "Generator Control" box. Press the "use" key to shut down the elevator. Leave the cage through the door then and go through the double doors to the right. As soon as you enter, equip your magnum and walk backwards. An alien slave will appear, one shot will kill him. Walk further then and kill another alien slave. You're back at the helicopter wreckage then and you can go past it now. Walk to the radio in front of you and listen to the orders of your commander. Destroy the crates next to the radio for some ammo. The crates to the right hold a medikit. Enter the hole on the right then and follow the ladder down. Go down the next ladder. Turn right. Watch out, there are some barnacles on the ceiling here. Avoid them and go to the left. Go through the door and you're back outside. Go through the door in front of you and follow the hallway. Kill the alien slave and get the shotgun next to the marine. Look down and take out the alien slave below you before it spots you. You'll have to stand on the edge to take him out, you cannot shoot it through the landing you're standing on. Follow the ladder down then and take out another alien slave a level below you. Crouch to avoid the steam and don't touch the barnacle. Go down the ladder and go through the door. Go through the right. Jump down and go stand behind the unbreakable dark green box on the right. A platform in front of you will come down. As soon as it's down, strafe to the left, and take out the alien slaves to the platform. Inside the crates, there's a medikit. Go to the right then. You reach a tricky part here, so be quick and watch out. Jump over the small gap and run to the ladder to the right. An alarm goes off and there will be electrical beams everywhere that destroy the platforms. Go up the ladder quickly and ignore the electrical beams (you will sustain some damage). Go stand in front of the door to the right then and watch how the beams take out everything. The level of the green toxic waste will start to raise. Look to the window to the left. The man in the suit will appear and will open the door for you. Enter the gangway and go up the elevator then. Do a crouched jump to get the ammo from the left. Then jump over the toxic waste and destroy the crates (not the flammable ones) for some extra items There are a lot of nasty headcrabs between the crates here, make sure they don't surprise you. You can lure them into the toxic waste if you've got some timing. Go to the left then and follow the stairs to the control room. Hold the conveyor control button until the conveyor moves almost completely to the left. Go to the conveyor then and use the crates to jump on top of it. Get the energy pack from the left and press the button there to open the cargo door. Jump over the toxic waste into the next room. Walk past the bars and to the left then. Look to your right, you see a broken pipe. Jump inside and the flow will take you into a big pool. Avoid he barnacles and follow the water until you see a ladder. Go up the ladder and over the bridge. Get he ammo and the grenade from the right. Go to the left. In the next room, you can't take the ladders down. Look to the sign, it reads "no access during robotic loader procedure". Look to the robot to the left. He's stuck because some crates are blocking his path. Shoot the crates and the robot will leave the room. Once he's out, you'll be able to go down the ladder. Go down the ladder in the back and use the crates to jump to the other side. Press the button at the toxic waste overflow system and wait until the area is drained. Walk to the big door in the back then and push the button. Go through the door and push the button in the back to ride the elevator up. There are some sound dogs up here. Take them out before they can use their sound wave attack. Go up the slope and walk to the bed with the plank on it to the left. Push it towards the tram. When it's in front of the tram, use the crouch jump to get on the plank and jump inside. 3.2 We're pulling out ? This level doesn't start too easy. The tram will bring you up. First kill the alien slave attacking the scientist. Next, as the tram brings you a little higher, take out the two alien slaves (there's one on each side). As you continue, you will see an alien slave running in the shaft below you. Kill it. The final alien slave is inside a tram that cross your path. You can take him out or dodge his beam. The tram will stop and you can step out. Take the ammo to the left. As soon as you take it, two alien slaves will appear, one in front of the train and one on top of it. Take out the one in front first, then the next one. Go to the left and you'll meet a security guard. As him to follow you. Let him take out all enemies you meet in the next area. Go up the stairs to the left then and look through the window. You can't go though the door. The security guard and the scientist will be killed. A beam will break the window, so make sure you're not standing in front of it. Jump through the window and walk towards the door to open it for the security guard. Walk straight forward. Walk to the door to the right and the security guard will open it for you. Inside, you find some ammo. Break the glass window on the left and jump inside. Talk to the professor and he will heal you. Walk straight ahead to the elevator. Look behind you, there's a broken grate in the wall and some headcrabs may leap out. Once going up, you hear some gunfire. Equip a gun and take out the alien slaves. There are three of them, but usually, the marine is able to take out one. Get the machinegun near the corpse of the marine and search all the crates for some ammo. Don't forget to load your armour on the HEV station. There's a security door here, but the security guard refuses to go with you, so you have to find another way. Jump on the crates to the right and then on the HEV station. Break the grate and follow the tunnel until you reach a ladder. Go up the ladder and enter the next room. Look through the window, there are some helicopters there. Heal yourself on the medic station and go through the door. Talk to your chief, you have to get to the hangar. Get the grenade and the satchel charge from the desk. Destroy the crates for some more ammo. Go to the marine at the door, he's threatening a scientist. Get past the scientist and use the crates to get the power cells. Then, destroy the small grate and follow the tunnel down. Destroy the crates and go through the door, the fire door will shut behind you. Walk to the door to the left, the man in the suit has closed it. Wait until the helicopter takes off and turn around then. Take out the alien slaves that appear and go through the hole in the wall on the left then. Go to the right. 3.3 Missing in Action ? Go to the left and move forward when the steam disappears. You have to crouch now, to move under the pipes. Near the back wall, you see a headcrab. Take it out with your pistol. Make sure not to touch the liquid on the floor there. Go to the right and two alien slaves appear. Take them out. Search the room for some ammo and two power cells. Next, go to the set of pipes to the right of the position of the dead headcrab. Climb the pipes and smash the grate to the right. Enter the small tunnel. There's a grate in the floor. Ignore the first one and smash the second one a little further. Jump down and get the medikit from the shelves. Now, go through the door and you're back in the first room. Climb the pipes again and follow the tunnel. Now smash the first grate and drop down Below you, there's a pool with an electrical wire. Make sure not to fall down or you'll sustain damage. There's an energy cell on a platform floating in the pool, but usually, you're at 100% armour at this point, so you won't need it. Avoid the tiles in the floor with some markings on it end. If you stand on one of those, they will drop down. At the end, go right and you reach some fans. Walk over the small bar and turn right. Jump to the bar at the other fan and go right then. Wait until the first team disappears, then quickly walk past the second one. If you really don't want to get any damage at all, you can also jump on the railing to the left. And then jump to the platform past the second steam as soon as the first one disappears. Jump to the platform with the door then. Kill the zombie scientists inside and search the crates for some ammo. Return and go to the right then. There are some fans in front of you. Walk in the exact middle of the path between the two fans and they won't be able to touch you. Go down the ladder and go stand in the exact middle of the path between the next two fans. Don't go to the other side of the room, go stand in the middle, halfway the path and look to the right. The fan only has one blade and below the fan, there's a broken grate. Crouch and as soon as the blade passes you, moved forward (crouched) and enter the tunnel behind the grate. Jump down and destroy the grates at the end, you have to get past some fires now. Wait until the trail of the fire is gone and jump. Don't touch the fire, even when you see only a little left. For the next fire, it's easier to cross when you stand on the first crate. Jump to the other side and take out the zombie grunt and the headcrab there. Search the crates to the right for an energy cell and a medikit. Break the grate in the left wall then and follow the tunnel. Break the grate below you and jump down. More fires. Move forward as soon as the fire disappears. The next fire is a little more difficult: you have to follow the fire to the left. As soon as it's gone, run inside the tunnel to the left and jump to the ledge on the right then. From there, take out the zombie grunts on the other side. Strafe to avoid their balls. Jump to the other side then and kill the zombie scientist and another grunt scientist. Search the marines in the back for some more ammo. Go to the left then. There's a fire testing procedure here. There are signs that read "do not obstruct the testing process). Naah, do it anyway :) There's an explosive crate somewhere around. Push it inside the fire testing tunnel and press the "test fire" button then. The explosion will create a hole in the floor to the left. Jump inside. Take out the zombie grunt and the headcrabs in the tunnel. At the end, look to the pipe to the right. Kill the headcrab and get inside then. Go to the right and break the grate, you're back outside now. Go straight forward and jump down. Turn around, there's another grate there. Get inside the tunnel and you find some ammo. Jump down then and walk to the truck. Talk to the marine and enter the building. Search the back of the truck for some ammo. Go to the left then, you'll hear some monsters running on the platform above you. Search the crates for a medikit. You see two doors with a button to the left. Ignore it and go to the right around the corner. Kill the two pit drones (one shot of your shotgun does the trick) and search the area for a medikit and two power cells. Return to the two doors then and press the button. The door to the right will open. Kill the four pit drones inside. Search the back of the truck to the left for a trip mine. Go up the stairs then, to the left, there's a power cell. Go to the right and search the crates, you find a satchel charge and a RPG. Go straight ahead then and kill the pit drones. You can talk to the scientist, but none of them seems to like you. Look through the door on the left. Jump to the ledge on the left and go down the ladder then. Take the next ladder down and walk to the elevator box. Climb up the grate inside and jump through the hole in the wall into the next room. Go to the left, you see a sign "caution, wet floor". Make sure not to touch the water or you'll get some electrical damage. Jump on the sign and then on the crate straight ahead. Jump to the left the and get over the crates. Go to the left and push the door to enter an area called "unit 2 power". Turn off the power with the "use" key and destroy the crates for some ammo Leave and go straight ahead past the crates. Return to the elevator shaft and go up the two ladders. Go to the right then and jump towards the electrical wire. Climb it up and jump on the elevator box in the air then. Enter the box for some power cells and enter the room then. Go to the left and follow the gangway. You'll be in front of a locked door but there's a grate to the left. Break the grate and use the tiny box a little further to get inside the tunnel. When you continue, the tunnel will collapse. Leave the tunnel and turn around. Go to the area behind the tunnel and kill the bull squid there. Next to the marine's corpse, there's some ammo. Return and go to the right then to leave the water. We'll have to do some puzzling here. First, go to the door in the back and push the blue crate into the area you came from. Push it to the pile of garbage to the right (with the garbage bin with the word "push" on it). Use the box to get over the garbage. Look to the room to the right then. Break the window and throw a grenade inside. Seek cover and the wall will explode. Get inside the room and go through the wall to the right. Now, you can push the blue box, through the hole in the wall past the pile of garbage. There's another grate there, break it and use the blue box to get inside. Just around the corner, there's a headcrab. Kill it. Break the grate and enter the next room. Walk straight ahead and a headcrab will leap down from a crack in the ceiling. Kill it. Look to the left, there's a hole in the floor with scientist. Get the power cells and walk to the back of the room then. Turn off the power and climb the wire up then. Jump down on the next level. Go to the right, there are some dead people there. Use the radio. Two marines are nearby and they're going to blow the door. Wait until the door in the back explodes. Order them to come with you and go to the door to the left (the elevator). One of the marines will burn the door open and you can get through. Wait until you all stand in the elevator and press the button then. 3.4 Friendly Fire ? This level starts with some heavy action. As soon as the elevator door opens, your squad members rush out and attack the alien slaves in the next room. It's possible a squad member gets killed and that's no problem, as long as the one with the burner survives. While you take out all the alien resistance in the room, he will burn open the exit in the back. When the area is clear, follow him. Go to the building in the back for some weapons Leave the marine there. Return and go up the stairs. Go through the door and enter the office on the right. Kill the alien slaves inside and get the ammo and the health pack. Leave the office and go through the door to the right. Slowly walk forward. As soon as you hear the alien slaves teleport. Retreat and take them out. Enter the room again and walk forward. Another alien slave will appear together with an alien grunt. Kill the both of them and go through the door to the right, this is the meeting room. Kill the alien slaves inside. When you walk forward, the wall on the left will explode and another alien slave appears. Kill him. Go through the hole in the wall and kill the rest of the alien slaves. Go through the door to the right then. There's a crack in the wall in the back. Climb inside and use the pipes to go up a level. Use the blocks of stone to get another level up. There's a power cell here, next to a scientist. Make sure not to touch the barnacle next to it. Jump to the other side and climb the ladder up. Run over the bridge and leap over the gap. Open the door in the back. Turn left. There's a big pool in front of you with toxic waste. On the other side, there's an annoying alien grunt. When he stands in front of the explosive crates, shoot them to take him out. This area seems uncrossable, but it's possible. You need to swing with the purple wires to the other side. Make sure not to touch the electrical wire while crossing. Swing to the other side and search the crates on the right then for some ammo. Ride the small elevator up on the right and you find more ammo. Watch out, there may be a sound dog around here. Use the radio to listen to your chief. You can't hear anything at all, except they're under attack. Go up the slope to the right and kill the sounds dogs. Use the construction to get out of the hole and talk to the marine, he's a medic. To make him heal you, simply keep the "Use" key pressed when standing in front of him (ignore his speech). To the left of the marine, there's a broken pipe. Get inside and go to the right. Break the grate and you see a strange missile. Go to the left then and watch out here, there are some heavily armed black-ops agents. This is one of the most exciting parts of the game. Break the grate and retreat at once, it's not possible to take them out by surprise. When they stop shooting, move back into the tunnel and wait until they appear. Take them both out, then leave the tunnel and go right. Go around the rocket and kill another black ops agent from behind by surprise. Search the crates and go to the left then. Stay behind the truck and throw some grenades to the area to the left, there are two to three blacks ops agents there. When they try to run from the grenade in your direction take them out with your machine gun. When they're all dead, return to the medic to regain some health. Return inside the building then and open the door to the left with the button. There's a marine inside and he needs medical attention. Go to the the other side and take out the sentry gun, open the door and order the medic to follow you. Lead him to the marine and let him fix him up. Order the both of them to follow you. Lead them outside, to the secure access door the medic mentioned. The marine will burn the door ... and get killed at once by the sentry gun. Take out the sentry gun and enter. Walk straight forward and you meet some more marines. Order them to follow you, you'll need their help. In the next area, there are a lot of black ops agent and they're extremely deadly. Let your squad members handle the left side of the area while you take care of the right side. As soon as you've secured area, assist them and nobody of your squad should be dead. Go up the stairs then and pull the lever at the end, the secure door in the back will open. Return and go to the left, to the new area. On the left side, there will be an opening with some health and ammo. Walk forward and you'll meet more black ops agents. Keep you're squad close to you and move forward slowly, while securing every area. When everybody's dead, gather the ammo, health and armour and go up the stairs. Pull the lever and return to the rails. Go stand on the cart and drive back until you see a post. Go past the post and hit it, so it flips. Then, drive the cart forward again and it will turn to the right now. Keep driving until there's another blacks ops agent on your left. Take him out and jump through the window inside the room to the left then. Gather all the weapons inside and use the small box then to get on top of the pipe. Follow it up and break the little grate on the right then. Follow it and exit. 3.5 We're not alone ? This is a very weird part. Go to the right and you see Freeman gets inside the machine that teleports him to Xen. Run inside the room and avoid the fireballs of the monsters. On the other side of the room, a bridge will collapse. Climb it and jump inside the teleport. You appear at Xen. Your aim here is to get inside the teleport high up in the air. To get there, use the various jump pads to get on higher levels. There's not much to explain here, but at a certain point, you'll find the displacer. If you use it on yourself, you will be teleported to the hazard course. There, you have to take out some alien slaves, then do a bit of the course and crash the window to step in the teleport and return to Xen. You don't have to do that, though. When you finally touch the teleport ball in the air, you return to earth. 3.6 Crush Depth ? Enter the elevator on the left and ride it down. Go to the right, you see a scientist with a radiation suit inside an aquarium. Kill the pit drones and use the stations on the wall to fix yourself up. Next, press the button at the control panels to release the scientist, he can open all secured doors for you. Order him to follow you and go to the other side of this area, there's a secured door there that needs identification. Let the scientist open the door and kill the squid bull inside the next room. Go to the next door and let the scientist open it. Oops! You have to find another way to get past the door. Return and look to the right, there are three aquariums and the one in the middle is broken. Climb the ladder up and take out the pit drones. Use the grate to get on the platform where the pit drones were and go to the right. A hole in the wall will appear and more pit drones will attack you. There are also often pit drones that fire at you through a hole in the ceiling, so watch out. Go through the hole on the right and kill the pit drones left. At the end of the room, crouch to the small tunnel and break the grate at the end. Jump down. There's some ammo in the back. Next, enter the cabin and push the button. You will be teleported into the water. Immediately swim to the right and exit the water. You reach a small area with three zombie grunts and two head crabs. Take them out and go through the small grate at the end. Jump down and you fall into a pool. Swim to the ladder in front of you and go up. In the next room, there's a zombie grunt, a zombie scientist and a headcrab. They're easy to kill. Go down the ladder and kill the two zombie scientists. You can't use the medical station in the back, it's broken. Use the HEV station and go down the ladder then. Go to the back of the room and turn the wheel to release the big monster in the aquarium. Now return to the pool. Jump into the water and use the displacer on the big water monster to warp it to Xen. Swim into his aquarium then and turn the wheel to the left to drain the water. Walk forward through the door. Go to the left. Some blue electrical rays are blocking your path. Shoot the control box near the ceiling behind the rays to disable them. Go through the door then and some monsters will appear. Kill the two pit drones and use the displacer on the shock trooper. Grab the ammo from the right and go to the left then. Enter the airlock and press the button. Go through the next door then, grab the ammo and step inside the teleporter. You appear at Xen. Walk into the next teleporter and you're back at earth. Push the button and the door to the right will open. Jump inside the water and use the displacer when both monsters are close to each other. Swim up the small shaft then and smash the grate. Walk straight forward. 3.7 Vicarious Reality ? Walk forward, up the pipe and shoot the headcrab behind you. There are more headcrabs in this room, so take them out. Go to the right and you enter an observation area. The door in front of you is locked, so there may be a problem. Behind you, some monsters appear. Take them out. Due to their teleportation, one of the windows is broken, jump through it into the observation area. A giant spider, the voltigore, appears. Now you kill it, flee or use the displacer on it. When it's gone, push the button in the small room in the back, push the button to bring an elevator down and ride it up. Go through the door and kill all aliens inside. Go to the right and press the right button, this opens a window where you can find some snarks. Go through the next door then. There's a medical station on your right. Go to the left and search the storage rooms for some energy cells and ammo. Watch out, if you open the door to the left storage room, a headcrab leaps towards you at once. Go to the elevator and break the upper right window. Jump through it with a crouched jump. Climb the grate to get on top of the elevator box. Climb the ladder up. Get on top of it and jump on the ledge. Then, look down and jump on the door a little lower. Walk straight forward then and turn left. Follow the tunnel through various doors until you can turn left. Ride the elevator down. Turn right, there's a medical station there. Go through the door and kill the pit drones inside. Break the window then and step outside. Follow the ledge to the right down. There are some plants in there with a sharp tail, they will take out the sounds dogs. Jump down then and step on the little green plants to get a spore for the sporelauncher (you don't have it yet). Go to the small door to the left and press the button to open it. Ride the elevator up and get the sporelauncher from the right. Walk around the corner and go past the door. Kill the zombie grunt and get another spore. Walk through the door then and go straight ahead, through the tunnel. A mysterious light appears in front of you. Go through the door. Enter the door on the right and take out all the sounds dogs in the room. In the next room, you can push a button to the right. A hologram of a scientist appears and you get to know they have been experimenting with the barnacles. Go through the next door and get the barnacle from the showcase, it's a barnacle gun. You cannot use it as a grappling hook on a stone wall, but it serves fine to tear off the head of organic creatures. You can experiment a bit with it in the next room. Get the power cell then and go through the door. Kill all the pit drones here and enter the pit. Get some spores and use your barnacle gun on one of the organic things on the wall to get to the other side. Go down the elevator and kill the headcrabs in the next room. Avoid the barnacles and go through the door on the other side. Ride the elevator up and go through the door. Kill the pit drone and the shock trooper. Go straight ahead then and ride the elevator up. Once up, kill the pit drones and the shock trooper. A little further, you find some ammo health and energy cells. Then, take the elevator back down and return where you met the first shock trooper. Go up the stairs and through the door. You see a danger sign. To the left, we have these annoying creatures from the original Half Life again. If you hurt it enough, it will retreat for a short while and that gives you the opportunity to pass. It's not always necessary to hurt it, though, sometimes you can pass and it misses you. When you passed it, jump down and collect all the items you can grab without getting hurt. Next, use the barnacle gun on one of the organic structures on top of the wall, next to the hole. Get inside the hole and enter the tunnel. Go to the right, follow the tunnel and exit. Get down and collect the ammo. Listen to the radio, they are in trouble with a big worm. Shut down the power to unit 1 with the lever. Then, climb back up to the other side of the room and smash the grate. You can pass the fan now. Follow the tunnel. 3.8 Pit Worm's nest ? Cross the pool and look to the upper right window in the back. The man in the suit is watching you again. Open the door in the back. Kill the bull squid in the next room. Push the lever to the right of the door and enter the next room. Climb the ladder in the back and gather all the ammo from the marines. Open the door and face the pit worm. It gets tough from here. Like the tentacles monster in the "Blast Pit" level of the original Half Life, gunfire doesn't hurt it, there's a special process to take it out. Go through the door and jump down to the ledge directly below. Run to the right. If the monster already has hurt you at the moment, you first have to shoot it in the eye to distract it for a short time. Inside, kill all the pit drones. The door in the back is broken, so return. Next to the boxes and the corpse of the security guard, you find a spore and a grate. Smash the grate and follow the tunnel. You end up on a room with a button to 'flush' the toxic waste. Unluckily, you can't do that yet. Go through the door on the left and you're on the lowest level near the worm. Run to the right and press the button to close the door. You enter the waste station 2. Kill the pit drone and go down the ladder. Go through the door on the right, you're now in a room with a lot of crates. Get past the crates to the other side of the room. Go through the door and jump past the barnacles over the green pool. Ride the elevator up. Kill some more pit drones and push the button. Two walls in the crates room will close in. Return to the room. Get all items. In the middle, there's a grate. Smash it and you'll drop down in some water. Smash the glass and kill the bull squid in the next room. At the end of the room, turn right, you read the word "outtake". Push the button to the right and the water level will start to raise. Run back fast and let the water take you up again. Return to the big worm then (up the ladder and pull the lever to open the door). Run back to the waste control room. The light "gearbox" lights up now, but "valve" still needs to be activated. Take the door on the other side now. Climb the ladder and take out the pit drones. Quickly run outside, pull the lever and the "vent" will be activated. Avoid the green beam of the pit monster. Go down the ladder again into the waste control room. You still need to activate the valve now. Return through the grate you used to enter the waste control room. The iron stairs above you are broken so use the two crates to get back on them. The pit monster is still looking for you from the lower level. look in front of you, a bit up, you see some green organic structures. Use your barnacle gun to get cross the distance at once. Turn the wheel and the valve will be activated. By the time you've done this, the pit monster will have noticed you, so you'll have to hurry. return from where you came and go back, through the tunnel, into the waste control room. Now that the valve & gearbox have been activated (check the names, those companies created the game), you can push the flush toxic waste button. The monster will get killed (finally). Now, get back, all the way up, until you get to the bridge control. It isn't blocked anymore, so press the button and a bridge will be formed. Cross the bridge. Pull the ever next to the door and continue. 3.9 Foxtrot Uniform ? Go through the door. Kill the bull squid at the end of the area. Walk to the end then and go to the right. Kill the bull squid and search the crates for some medikits and power cells. Use your barnacle gun on the organic structures to get on top of this room. Jump to the ladder then and climb it up. You see a black ops truck arrive. Take out the three agents that step out from the truck. Just around the corner, there's someone with a nasty sentry gun. Use your RPG to take him out at once. Go to the red crate then and enter it. Watch out, some black ops agents may be throwing grenades towards you. From that position, take out the black ops in the next area. There are two on the ground and one in a tower If you want to play it safe, you can use some snarks to distract the ones on the ground. In the meantime, finish them off. The one in the tower is harder to get. You can try to get out of his sight, but a shot from your RPG also does the trick. Destroy the crates and go to the back then, there's a small entrance to the right. Enter the room, there are some marines here. Grab all the ammo there and order your squad members to wait they can't do anything at the moment. First, go back outside and throw a grenade (or the secondary fire of the submachine gun) into the two towers. There are some agents there you need to get rid off. Once they're dead, it's time to deal with the sniper. Go back to the marines and go through the entrance. Stay low and seek cover all the time. The sniper is in a high position in front of you. Inside a building, you'll find a ladder, climb it up and take out the sniper, you get a sniper rifle now. There are three entrances to continue now. One is blocked by two trip mines above each other (uncrossable) and another by two trip mines after each other. The third one is an easy passage, it's near the position of the sniper, just past some barrels. It may seem tempting to take the easy way, but all the black ops agents will now you're coming then. On the other hand, it's not possible to blow them up, no matter how far you're standing from the explosion, you'll always die. So, the entrance with the two trip mines above each other is not an option This is what I did: go to the trip mines that are after each other. Duck below the first one and jump over the second one. It doesn't seem to be possible to get past the crates. Jump back over the trip mine and then jump ON TOP it. Next, jump on the explosive crates and from there, jump onto the garbage bin. Now you can get past the crates. Take out the two black ops agents in front of you with a grenade. There are a few more, but you can all take them by surprise because they don't suspect you to come from there. When they're all dead, search the crates for some energy cells. There also is a sniper rifle lying on the ground. Go through the entrance to the left then. Turn left and you see some black ops agents fight a shock trooper. Let the alien finish them off, then take out the alien. Search the back of the truck on the right for some ammo. Go up the platform on the left then and down the manhole. You reach one of the trickiest parts in the game, I've spend a lot of time there. You're now inside a labyrinth and there are a lot of voltigores here, more than your displacer can handle. First save, find your way through the maze, load and play the game for real then. Take out all the voltigores. When you're out the maze, you're inside some water. Climb the ladder to the right and a lot of pit drones will appear. Run to the entrance to the right and pull the lever. Do the same at the other side. In the meantime, just ignore the pit drones and make sure you don't get hurt too much. You have to do this because the drones just keep on coming otherwise. Take out the rest of the drones then. Search the crates for some medikits and some RPG (you'll need it). Go through the entrance to the other side and you'll in another maze. Take out the voltigores with your RPG, satchel charges, displacer, ... Eventually, you will reach their nest. Take out the little ones (they're NOT cute, so it's OK). Finally, you can leave that damn maze. Go up the ladder and some marines will recognize you. They will cut the grate and you can leave the sewers. First, grab all the ammo from the shelves, then order them to follow you if you want them to help you. Now, there's only one path you can follow are there are lots of voltigores and shock troopers. You will need to use all your explosives and spores to take them out. They don't keep respawning, you just have to keep moving on and secure the area you just passed. When no alien is alive, you'll see a big door that reads "confined space" with an entrance. Get inside. It's pretty dark, so you'll need you night vision. Proceed to the next area, a huge monster, the Gargantua, awaits you. Look to the far wall in the back, there are some alien plants there, so use your barnacle gun to get on the other side at once. From there, take out the shock troopers that appear. Two marines are fighting the Gargantua, but the bridge has been wired. Light the fuse and an explosion will kill the Gargantua. Walk to the gap in the bridge, there's a pipe to the left with a hole in it. Jump inside the pipe and walk to the right, it will cave in and the flow brings you to a new area. 3.10 The Package Follow the flow. On the left, you see a grate, but you can't break it. Follow the flow a little further and go left then as soon as you can. There's a broken grate. Get through it into the water. Turn around and look above you, there's a dead marine there. Get the shotgun ammo. Swim to the shore and you find some new squad members. Move forward and take out the black ops agent in the water. There's one with a sentry gun on the other shore. Order you squad members to wait and use your sniper gun to shoot the agent from behind a rock in the shoulder. Proceed to the other shore then and secure the area. To the right, there are more agents, they are usually hiding under water and they're positioned too much to the left to take them out with the sentry gun. Take them out. Then, return to the sentry gun. There's a big chance some more black ops agents will appear from the shore you came from. Take them out with your sentry gun, then follow the water area, to the left of the wreckage of the helicopter. This is a bit tricky. In the back, on top of a building, there is a black ops agent with a mortar launcher. You cannot take him out with your sniper rifle because there's some glass shield protecting him. Leave your squad members behind and run straight at him. He will miss you as long as you don't stand still and keep moving forward because he doesn't aim for your movement position. Go to the right of him and get on the platform. From there, you can take him down with your sniper rifle. In the crates, you'll find some ammo for your RPG. Stay away from the building in the middle. As soon as you approach that area, three shock troopers will appear. Go to the building to the right of the ordinance area. Enter the building and take out the black ops agent to the right, down the stairs. Listen to the radio, a marine is trapped by black ops, but he'll open the bunker doors at the other side of this area. Go back outside. Some black ops agents will start firing at you. Retreat inside the building. Once you've showed your face, the agents will approach you. As soon as they appear in front of the door, take them out with the secondary fire of your shotgun, but watch out for grenades. Run to the other side of the area, straight forward. One of the double doors of the bunker has been opened. Get inside the stockage area. Get on the crates to the left. From there, jump to the right, between the two pipes in the back of the room. Follow the red light into the new area. Go up the stairs and turn right. Take out the black ops agents and search the crates for some items. Go to the other side then, some agents will await you. Take them out and follow the stairs up. Go through and you can use the mortar launcher yourself now. First take out all aliens, then aim to the very left and high to shoot the stone walls that surround the building to the left. Shoot the aliens that appear and run to the building then. Go through the door and enter the next area. There's a voltigore here and a lot of shock troopers. Take them out. A black ops helicopter will fly over and fire at you. Use your RPG to take it down, it gives a really nice explosion. Enter the entrance to the right then and kill the shock trooper inside. Proceed to the next area. Enter the back of the truck and get the power cells. Go to the left and get the ammo. Climb the ladder. Now jump on the black tap on the roof, then on the box and from there on the other roof. Proceed and go down the ladder then, you're past the fence now. Crouch under the big door and go through the door on the left. Turn off the power and return. Climb the ladder. Look down, there's a wire from one roof to another above the truck. The power is turned off now, so it's safe. Cross the gap over the wire to the other roof. Get the medikit and walk to the box in the back. Get on top of it and then inside. Drop down into the ventilation shaft. Kill the pit drones, go down then and you'll get a lot of enemies to battle, about five shock troopers and a voltigore. Take them out. Walk forward and a few black ops agents will descend from the ceiling. Take them out and walk to the back then. Destroy the crates to the left for some items, you'll need them. Go up the jeep then and talk to the security guard there, he heard the black ops talking about a bomb. Follow the tunnel and enter the next area. Take out the black ops agent guarding the door with your sniper rifle. There's another one running around too. Walk to the door. The security guard won't let you in, because the bomb is armed. Walk past the fences to the left, two black ops agents are working on the bomb. Take them out with your sniper rifle and use the "use" key then to disable the bomb in the back of the truck. Return to the door and the security guard will let you in. Go to the right. Get some items from the shelves and ride the elevator down. 3.11 Worlds collide ? From the start, there are more than ten black ops agents and sniper babes that await you. Stay close to your starting position and try to take them out one by one. If you get to chance to kill two or three at once with a grenade, don't hesitate. Throwing a grenade won't work, because they will avoid it. You need the secondary fire of the submachinegun or a quick satchel charge. When they're all dead, run to the left and take out the agent behind the sentry gun. Go to the right of the sentry gun and use the crates there to get on the platform. Walk to the back and drop down. Kill the black ops agent. Now, look to the right, crates are passing by. Look to the wall a little to the right inside the tunnel, there's a small alcove you can enter. As soon as a crate has passed, run inside the tunnel and stand in the alcove for a short moment. As soon as another crate has passed, run to the entrance on the other side. There are some black ops agents here, on the platform above you, so throw a quick grenade to take them out. Go up the elevator and search the crates behind you. Go straight ahead then. In the back of the room, you see some crates that form a stairway. Use them to get as high as possible. Proceed on top of the crates and jump to the right inside the entrance. Move forward slowly and look down, there's a big fight going on between the black ops and the aliens. Wait until one side has lost. Jump from swinging crate to another one and land on top of a big crate. From that position, try to take out all resistance with grenades and satchel charges. When all resistance has been eliminated, run up the slope to the left then. Search the crates and the door on the right will open. Talk to the security guard, he has seen a terrible monster. Search the shelves and the crates for ammo, you have to be fully equipped now. There are also some stations for health and HEV. Enter the elevator and press the button to ride it down. When down, a force will push you back. There's also something strange about the gravity. Never mind that and walk forward. Go down the stairs an open the door. You reach a room with a ladder and a rope. Use the rope to get on a higher level. Look to the left there, there's a healing pool near the wall. When fighting the boss, you'll get some serious damage. Return often if needed, there's no time limit on fighting the boss. Proceed to the next room. There's a big purple portal here and sentry guns on both sides of the railing. Go to the sentry on the left and wait until something really big appears from the portal, it's the final boss and he looks really mean. There are two weak spots on his body, though, they light up a in yellow (I think they are the eyes). Make sure to avoid contact with the green toxic waste it breathes. When you shot one eye, walk to the sentry gun on the other side and shoot the other one. When both eyes are hit, a spot under his belly will open up and you see a purple ball, this is his vital spot. Try to hit the purple ball as much as you can with your sentry gun, it's the only way to kill it. Now do the whole process again. Don't forget to return to the health pool when your health is low. Now and then, the purple ball spawns a shock trooper, so make sure to take that one out first. The second time you hit the ball, the monster will start to destroy a part of the bridge you're standing on and the ladder to reach the left sentry gun from the ground. From then on, you'll have to use your barnacle gun on the organic structure on the other side to get to the left sentry gun. Do the process again until the monster will retreat and explode. 3.12 The end You get to know the man in the suit a little better and the game ends as good for the "hero" like Gordon Freeman in the original Half Life. Too bad, Shephard :( _______________ IV New monsters ? Not all monsters are new, so I suppose you're familiar with the ones from the original Half Life. I'll give a brief overview of the new monsters in Half Life. Zombie Grunt ------------- An unfortunate grunt who got himself headcrabbed and turned into a zombie. He's much tougher than the zombie scientist. He will rush towards you and fire red balls (parts of his body ???) towards you if there's some distance between you. Like the zombie scientist, you can take them out with your knife or your wrench. A few bullets from your pistol in his head work fine too. Pit Drone ---------- One of the new Race-X aliens, a race of aliens that appeared in Black Mesa after Gordon left for Xen. Pit Drones can use their claws for close combat and have the ability to shoot spikes from their forehead, which regenerate in time. The spikes are shot at a fast speed, so you'll have to be quick to avoid them. Usually, they are not so tough to take them out, one blow of your shotgun at close distance will take them out. Shock Trooper -------------- This a very nasty alien from the X-Race alien breed. They can create portals to call reinforcements. A shock roach is attached to their side and they use it to fire. They fire at a very fast firing rate and they can take a lot of damage before they die. When it's dead, the shock roach leaves the body of the shock trooper and attacks you. Voltigore ---------- This is the toughest of the 'regular' aliens. It looks a bit like a huge spider and it has two claws that do serious damage. They can also spit some purple electricity. When they die, they explode and do some radial damage, so don't stand too close. ________ V Cheats 5.1 Easter eggs ---------------- * When you approach the Boss of Opposing Force, there is a Weird Mumble jumbo of sounds. When played backwards they say "To win the game you must kill me Randy Pitchford". Just like when you beat Doom 2 who was made by John Romero the Co-Founder of Doom. Like ID software, Randy Pitchford is the leader of Gearbox Software who made it. Note: An easy way to play the sound is open the pak0.pak file with a program like PakExplorer and search for the sound dsbossit * Just like in Half Life where the names of some of the people who made it were put around the lockers in the locker room, the names of some of the people who made Opposing Force are also in certain places e.g. at the start of the boot camp level look at the names on the boxes beside the beds. 5.2 Cheats ----------- Go to Windows Explorer. Right click on the hl.exe file (from opposing force). Select "create shortcut". Right click on the shortcut. Select "properties". Go to the Tab "shortcut" (if not selected already). Go to the line that reads "target". There add -dev -console -game gearbox behind hl.exe. It will look similar to this now: hl.exe -dev -console -game gearbox Start the game. From then on, you access the console using ~ (the key above Tab and below Esc) The following commands are available in console then: IMPULSE 101 : All weapons and ammo /GOD : God mode /NOCLIP : Walk through walls and fly /NO TARGET : Enemies ignore you /GIVE xxxx : Give item xxxx /GIVE AMMO_556 : ammo for M249 /GIVE AMMO_762 : Give ammo for Sniper rifle /GIVE WEAPON_X : Replace X by any other weapon names below to get the desired weapon: * GRAPPLE * KNIFE * PIPEWRENCH * EAGLE * M249 * SNIPERRIFLE * DISPLACER * SHOCKRIFLE * SPORELAUNCHER /MAP xxxx : Replace xxxx with one of the map names below to warp to that level: * OFBOOT1 * OFBOOT2 * OFBOOT3 * OFBOOT4