Holey

After a biological war tore the world apart, lethal creatures overran what remained of civilization. We took shelter inside a collapsed tunnel, believing we had found temporary safety. There was something living in the hole down there. At first, it seemed harmless. Until it got hungry. We lost people before we understood the pattern. When fed, the creature produces a strange byproduct, a substance that can be refined into fuel. Fuel we desperately need. If we can keep it fed, we might be able to generate enough to reach the radio tower. And if the tower still works, it may be our only chan(Storyline via IGDB)