Successfully complete the game, then start another game in special mode. Note: Only characters that survived will have an alternate costume.
Alternate menu background
Successfully complete the game to unlock an alternate menu background.
Gallery 1
Successfully complete the game on the hard difficulty setting to unlock Gallery 1.
Gallery 2
Successfully complete the game in special mode to unlock Gallery 2.
Laser-sight pistol
Successfully complete the game under the normal or higher difficulty setting, then start another game in special mode. The first available gun will now be a pistol with a laser sight.
Morgenstern bat
Successfully complete the game, then start another game in special mode.
Special mode
Successfully complete the game.
Video sequences
Successfully complete the game to unlock a making of, behind the scenes, and two music videos.