Buffy The Vampire Slayer

Unlock Multiplayer arena 1
Push Y(4 times), White, Black, Y(4 times), White, Black
buttons while you are at the extras screen to get access arena 1.
If the code is accepted, you should hear a scream.

Unlock Multiplayer arenas 1 - 2
Push Black(4 times), White, Y, Black, Black, White, Y, White, Black
buttons while you are at the extras screen to get access multiplayer
areanas 1 through 3. If the code is accepted, you should hear a scream.

Unlock Multiplayer arenas 1 - 3
Push White(4 times), Black, Y, White(2 times), Y, Y, White, Black
buttons while you are at the extras screen to get access multiplayer
areanas 1 through 3. If the code is accepted, you should hear a scream.

Unlock Multiplayer arenas 1 - 4
Push Y, Y, White, Black, Black, Y(5 times), White, Black
buttons while you are at the extras screen to get access multiplayer
areanas 1 through 4. If the code is accepted, you should hear a scream.

Unlock Dark Buffy in arena mode
Push Black, White, Y, Y, Black, Black, White, Black, Black, White,
Black, Black, White, Black(3 times), White, White buttons
while you are at the extras screen to play as Darak Buffy in
areana mode. If the code is accepted, you should hear a scream.

Unlimited health
Push Y, White, Black, Black, White, Y, Black, Black, Black, Y, Y, Y
buttons while you are at the extras screen to enable god mode.
If the code is accepted, you should hear a scream.

Slayer power
Push Y, Y, Y, B, B, B, Y, White, Black, Black, White, Y buttons
while you are at the extras screen for more slayer power. -
If the code is accepted, you should hear a scream.


Unlock Characters
Unlock the following characters bellow by completing the indicated
missions with the indicated rating:

Mission Rating - Unlockable Character
1 - Professional Male Vampire
1 - Slayer Female Vampire
2 - Professional Zombie Skeleton
3 - Professional Zombie Demon
3 - Slayer Tara
4 - Professional Bat Beast
4 - Slayer Zombie Devil
5 - Professional Materani
6 - Professional Psycho Patient
6 - Slayer Sid the Dummy
7 - Professional S&M Slave
7 - Slayer S&M Mistress
8 - Professional Faith
9 - Professional Zombie Soldier
9 - Slayer Kakistos
10 - Professional Abominator
10 - Slayer Chainz
11 - Professional Zombie Gorilla
12 - Professional Joss Whedon
12 - Slayer Chris

Get More Stuff
Finish these missions to get the item indicated:

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

Friend
Get Cemetary Arena - Finish Level 2 with a Slayer Rank
Get Initiative Arena - Finish Level 8 with a Slayer Rank
Get Quarry Arena - Finish Level 11 with a Slayer Rank