Bonus Arena:
In World 1 Arena 1, after you have blown up the atomic door with the "world's
smallest atomic device", turn around and go back to the original cave you
started the game in. You will find a shimmering pink ball. Step into the ball.
You will appear in a new arena. Shoot all the Grunts in this arena. A tornado
(useful for killing everything in an arena) and health bites will float down.
Pick up these goodies and then step back into the ball. You will arrive back
into the original cave and continue onward to Arena 2.
Air strike:
Pause game play and press Down, Up, Circle, Down, Up, Down, L1.
Cow strike:
Pause game play and press Up, Down(2), L1, Right.
Super chain gun:
Pause game play and press Left, L1, Down, Square, Triangle, Up, Down.
Thumper weapon:
Pause game play and press Down, Up, Left(2), Triangle, Up, Right, Down.
Twister weapon:
Pause game play and press Down, L1, Square, Triangle, Right, Up, X.
Grenade:
Pause game play and press Triangle, Circle, Square(2), L1, Right.
Sniper grenade:
Pause game play and press Up, Square, L1, Left, Circle, Triangle, Square.
Homing sniper grenade:
Pause game play and press Left, Up, X, Triangle, L1(2), Right.
Mortar:
Pause game play and press Left, L1, Triangle, Square, Right, Circle, Left(2).
Most interesting bomb:
Pause game play and press Down, Right, Circle(2), Left(2), Up, Square, Triangle.
Dummy decoy:
Pause game play and press X, L1, Right, Circle, X, Up, Square.
Level select:
Hold L1+ L2 + R1 + R2 at the main menu, press Triangle, Up, Triangle, Circle,
Right, then immediately release L1, L2, R1, and R2 when the level select text
appears.
Invincibility:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Circle, Triangle(2), Circle, Right, Up, Left, L1,
Square.
Extra airstrike:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Down, Up, Circle, Down, Up, Down, L1.
World's most interesting bomb:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Down, Right, Circle(2), Left(2), Up, Square,
Triangle.
Super chain gun:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Left, L1, Down, Square, Triangle, Up, Down.
Mortar:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Left, L1, Triangle, Square, Right, Circle, Left(2).
World's smallest nuke:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Down, Up, Square, Triangle, Down, Circle(2), Right.
Seal:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Circle, Triangle(2), L1, Right. Note: This code may
only be enabled during the last level of the game.
Faster speed:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Right, Circle, Triangle, Circle, X. Press R2 during
game play to activate faster speed.
Bones seal:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Triangle, Right, Circle, Left(2).
Super gun:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Right, Up, Down, L1, Down, Circle, Left(2).
Homing bullets:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Square, L1(2), Right.
Full hit points:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Right, L1, Square, Triangle, L1, Down.
Nodie:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Circle, Triangle(2), Circle, Right, Up, Left, L1,
Square during game play.
Earthworm Jim power-up:
Pause game play. Press Down, L1, Up, Square. Resume game play and immediately
pause the game again. Press Up, Down(2), L1, Right.