Buffy: The Vampire Slayer

At the Extras Screen, press:

Unlock Multi-Player Arenas:
Y, Y, White, Black, Black, Y, Y, Y, Y, Y, White, Black


Unlimited health:
Y, White, Black, Black, White, Y, Black, Black, Black, Y, Y, Y

Slayer power:
Y, Y, Y, Black, Black, Black, Y, White, Black, Black, White, Y

Play as Dark Buffy in arena mode:
Black, White, Y, Y, Black, Black, White, Black, Black

Arena Mode ( Multiplayer):
YYW-BBY-YYY-YWB

where:
Y-Y button
W-White button
B-Black button

 