Apocalypse

This cheat you will love.
It is to have bonus levels.
U pause and press L2,L1,L2,L1,L2,L1.

To complete the game invisible , kill the 2 baddies at the beginning of the first level and pause , hold L1 and press square , circle.
If done u are invisible.

Energy Refill:
hold l1 then press,x,triangle,then circle (need to be in cheat mode)

To enable cheats, pause the game and hold down the L1 button and then enter the code.
Invincibility: Down, UP, Left, Left, Triangle, Up, Right, Down
All Weapons:   Square, Circle, Up, Down, X, Square
Level Select:  Triangle, Up, X, Down
Debug: Down,   Down, Triangle