I just recently bought this game and me and a friend started a new game. So we started the game killed everything we saw we went down these stairs down a hallway and into this building and exited the other side and circled around another building and went into the only door we could find. Inside we just kept going around in circles up tons of stairs. At the end we found a large room with these two large generator looking things in the middle of the floor and stairs on both sides, one side leading to some kind of control room with computers. At the bottom of the stairs in the far corner of the room there was a door leading into a long cave like hallway with doors on one side and some kind of alien looking thing in a machine at the end of the cave. We could only get into like two of the rooms along one side of the cave and thats pretty much it. We cant figure out what to do or where to go, everyones dead and weve picked up everything we could find. So for the last few days we havent really done anything theres no point in playing if we cant figure out where to go. And i cant find the guide to the game anywhere, can some please help us out,ty???

Well, if I'm not mistaking, in one of the sidedoors, there should be a room where someone has to go grab a keycard and the other has to back him up with a cameracontrolled machinegun. Hope that helps.

Throw timed mines at the "alien looking thing".

You have to blow up the sattelite dish on top of the first buildings. Always check the in-game objectives menu!!!!!!!!!!!!!!!