Players explore a large cargo station in search of treasure which then accidentally triggered the self destruct sequence. The player must progress from level to level, killing every monster in order to advance. On the lowest level is a computer that must be "debugged" in order to stop a self-destruct sequence. The player is assisted by a fellow debugger named Leon who provides information and weapon and is also your buddy. The game featured a minimal ability to look up and down. Selecting a harder difficulty generated a blob-like monster that moved on the ceiling.