Obscure PC Game Cheats

Different Costumes:
Finish the game, then start another game in special mode. Note: Only characters that survived will have a different costume.

Laser-sight Gun:
Finish the game under the normal or higher difficulty setting, then start another game in special mode.

Morgenstern Bat:
Finish the game, then start another game in special mode.

Special mode:
Finish the game.

Video sequences:
Finish the game to unlock a making of, behind the scenes, and two music videos.