Cheats for Eternal Darkness: Sanity's Requiem (GAMECUBE)

Get Level Select
Beat the game 2 times on the same save game to get Level Select

Show Credits
Beat the game 1 time

Get Different Ending
Beat the game 3 times on the same save game to get a new ending.

Invincibility
Beat the game 3 times on the same save game to get Invincibility