Old abandoned military bunkers, which have not been used for a long time, should be checked periodically. Your group is doing just that. And here we are not talking about the usual technical verification. For some time, anomalous phenomena began to appear in such places, after which unknown species of mutants and monsters appear in concrete bowels. A subdivision for cleaning underground corridors was formed, so that the creatures did not get to the surface and did not damage the civilian population. In the next mission Bunker of Monsters, you go on a hunt for creepy creatures, very evil and dangerous.