Infinite Health
     At  the  Extras  menu,  press  Y,  White, Black, Black, White, Y,
Black, Black, Black, Y, Y, Y.

Slayer Power
     At  the  Extras  menu,  press  Y, Y, Y, B, B, B, Y, White, Black,
Black, White, Y.

Play as Dark Buffy in Arena Mode
     At  the  Extras  menu,  press  Black,  White, Y, Y, Black, Black,
White,  Black, Black, White, Black, Black, White, Black, Black, Black,
White, White, White.

Bonus Arenas
     At  the Extras menu, press Y, Y, White, Black, Black, Y, Y, Y, Y,
Y, White, Black.