A government outpost in the backrooms has been working on cutting out a section so they can bring it back for materials testing. As the Counterterrorists your job is to protect two key places on the airship on the way back: the samples and the ship's fuel. If either of these gets destroyed your journey back to the real world is over. Unbenounced to the Counterterrorists a group of Terrorists have sneaked their way on to the airship to keep the government from getting hold of the samples. Their key targets are the same ones the Counterterrorists have to protect. Destroy the fuel to destroy their hopes of escaping the backrooms or ruin their samples so they have to go back. The Terrorists have to strike fast or else the airship will make it out of the backrooms . . .