You wake up in an empty metal room. There are others here, but they are unknown to you. Even worse, you are unknown to yourself. You have no memory of your life before this. Yet you remember how to survive.

You and your newfound allies are trapped in the Machine. A huge, malevolent deathtrap. You will not go far before you realize this. The cells of the Machine, Assimilators, hunt and trap the people inside the Machine. The lucky ones are killed outright, but most are altered by the Machine.

You can’t stay flesh for long within the Machine. If the Assimilators don’t kill you, they cut away the soft tissue and replace it with steel. There is a purpose to the Machine. If only you could find its secrets, you might be able to escape. While you are still human.

Metalmorphosis runs on a variation of the Powered by the Apocalypse-system. The characters the players control have four stats. During play the characters will activate Transitions (moves) that influence the progress of the story.