Somebody's been flinging antimatter around this world; the surface consists of overlapping impact craters, which have occasionally been tunneled by robots.

Oh, didn't I mention the robots? There are robots. And they will try to kill you.

Other than pain, death, and fear, this world also contains a tunnel that looks like a pyramid--a yellow carat. It's full of more of that nice pain/death/fear/robots mix, though it has a natural-cave layout, not a pyramid layout. Somewhere in that tunnel is a steel room with fourteen alien bombs in it.

This only leaves one question: what will you do with fourteen alien bombs?