Obscure
Successfully complete the game to unlock special mode.
Successfully complete the game, then start another game in special mode. The morgenstern bat will now be available.
Successfully complete the game on 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.
Successfully complete the game, then start another game in special mode. Note: Only characters that survived will have an alternate costume.
Successfully complete the game to unlock an alternate menu background.
Successfully complete the game on the hard difficulty setting to unlock Gallery 1.
Successfully complete the game in special mode to unlock Gallery 2.
Successfully complete the game to unlock a making of, behind the scenes, and two music videos.