Thought of another one. Geist. Was this awesome FPS/puzzle game on Gamecube where you play as a ghost who can possess stuff in the environment to scare people, and by doing that you can take control of them. Had plenty of problems, and I see why it wouldn't catch on, but it was pretty creative and fun. Had a great soundtrack which I can't find anywhere save for a few songs that were apparently recorded directly from the game audio.
