Unlock Extras:
Anthony Stewart Head Interview:
Complete Mission 1
Amber Benson Interview:
Complete Mission 2
Nicholas Brendan Interview:
Complete Mission 3
Robin Sachs Interview:
Complete Mission 4
Chaos Bleeds Comic Book:
Complete Mission 5
James Marsters Voice Over Session:
Complete Mission 6
Anthony Stewart Head Voice Over Session:
Complete Mission 7
Amber Benson Voice Over Session:
Complete Mission 8
Nicholas Brendon Voice Over Session:
Complete Mission 9
Robin Sachs Voice Over Session:
Complete Mission 10
Joss Whedon Voice Over Session:
Complete Mission 11
Out-Takes:
Complete Mission 12

Unlock Multiplayer Arenas:
Cemetery:
Complete Mission 2 with Slayer rating
Initiative:
Complete Mission 8 with Slayer rating
Quarry:
Complete Mission 11 with Slayer rating
Unlock Multiplayer Characters:
Male Vampire:
Complete Mission 1 with Professional rating
Female Vampire:
Complete Mission 1 with Slayer rating
Zombie Skeleton:
Complete Mission 2 with Professional rating
Zombie Demon:
Complete Mission 3 with Professional rating
Tara:
Complete Mission 3 with Slayer rating
Bat Beast:
Complete Mission 4 with Professional rating
Zombie Devil:
Complete Mission 4 with Slayer rating
Materani:
Complete Mission 5 with Professional rating
Psycho Patient:
Complete Mission 6 with Professional rating
Sid the Dummy:
Complete Mission 6 with Slayer rating
S&M Slave:
Complete Mission 7 with Professional rating
S&M Mistress:
Complete Mission 7 with Slayer rating
Faith:
Complete Mission 8 with Professional rating
Zombie Soldier:
Complete Mission 9 with Professional rating
Kakistos:
Complete Mission 9 with Slayer rating
Abominator:
Complete Mission 10 with Professional rating
Chainz:
Complete Mission 10 with Slayer rating
Zombie Gorilla:
Complete Mission 11 with Professional rating
Joss Whedon:
Complete Mission 12 with Professional rating
Chris:
Complete Mission 12 with Slayer rating