Anachronox

A role-playing game based on id Software's popular Quake II engine. Sylvester "Sly" Boots and his companion, Stiletto Anyway, must travel across the galaxy and through three dimensions to unravel the story of a long-dead alien race and their advanced technology. Mysterious beings (perhaps the remnants of the very race they're attempting to learn more about?) are bent on destroying our entire universe, and it's up to Sly, Stiletto, and five other characters to help answer the questions about these beings, and save the universe from annihilation.