And to enjoy it some more enter these while playing Revolution or Chaos mode:
Infinite Time:
L1, L2, R1, R2, Circle
Infinite Ammo:
L1, L2, R1, R2, Triangle, Square
God Mode:
L1, L2, R1, R2, X
Unlock Bull:
Right, Right, Right, Right, X
Unlock Freak:
Right, Right, Right, Right, Circle
Pass Current Mission:
Left, Left, Left, Left, Triangle
If done correctly yellow text will appear at the bottom of the screen.