New outfits:
A new outfit will be unlocked for every character that survives to the end.

Mace - Big stick with nails:
Complete on 'Easy' mode. Gallery 1:
Complete game in 'Hard' mode.

Gallery 2:
Complete game in 'Special' mode.

Unlock Hard Mode: Clear the game.

Special Mode/New Costumes: Clear the game.

Sum41 and Span Music Videos: Clear the game.

New Weapons: Clear the game (baseball bat and laser scoped handgun).

Unlock Special mode:
To unlock Special mode successfully complete the game.

Unlock Morgenstern Bat:
The Morgenstern bat will become available when you successfully complete the game and start another game in Special mode.

Unlock Laser-sight Pistol:
The Laser-sight Pistol will become available when you have successfully completed the game on Normal or higher difficulty setting and then start another game in Special mode.

Unlock Alternate Costumes:
Complete the game successfully and then start another game in Special mode. Only the characters that survived the completed game will have an alternate costume.

Unlock FMV sequences:
Complete the game successfully to unlock behind the scenes, two music videos and making of FMV sequences.