To use the following, just pause the game and enter the code (or codes) desired. Effect Code
Screen Dim Off A, A, A, A, B, B, B, B
Config screen A, C, C, A, B, A, B, Left
Jump to Unzip C, A, C, A, B, A, A, Up
Debug Mode A, B, C, C, B, A, B, B
1 UP A, B, C, C, C, A, A, B
1 UP (once) A, B, C, C, C, A, A, A
Energy A, B, C, A, B, C, A, A
Energy (once) A, B, C, A, B, C, A, B
Ammo C, B, B, A, C, B, A, A
Ammo (once) C, B, B, A, C, B, B, A
Money Worm C, A, B, A, B, A, C, A
Money Worm (once) C, A, C, A, C, A, C, A
Continue A, A, C, C, B, A, Left, Right
Continue (once) A, A, C, C, B, A, Left, Left
Extra Ammo
For extra ammo, follow these instructions.
Either go to the level you want or start from the first level.
Enter the code for the weapon of your choice.
Skip to any level desired.
Return to to the level you were on at #1.
If completed correctly, you should have 1000 shots with the weapon you selected in Direction #2.
Invulnerability
To save Jim from the early birds, pause the game and press A, A, A, A, Left, Right, Right, Left. To become vulnerable again, just re-enter the code.
Level Select
To warp to any level, pause the game and enter one of these codes. Level Code
Puppies One C, C, C, C, C, C, A, A
Puppies Two Left, Right, B, C, C, Left, Right, A
Puppies Three Right, Right, A, B, C, Left, Right, A
Peter Pan C, B, C, Left, Right, Left, A, B
Abduction Down, A, C, Left, Right, Down, A, C
Inflated Head B, B, C, A, B, C, Left, Right
Sally A, B, C, C, Up, C, Left, Right
Soil A, A, C, C, B, B, A, A
Meat C, C, Down, Down, A, Right, Right, Left
ISO A, B, C, Right, Right, Right, Right, Right
Run Jim Run B, B, C, Left, Left, Left, Left, Right
Level Select and More
For access to a special room with level select and more, pause the game and press A, B, C, A, B, A, C, Left.
Manta Shield
To use the manta shield, press and hold A + B + UP. You'll gain a temporary shield for the next 10 seconds.
Map View Mode
Pause the game and press A, C, C, B, A, A, B, Up. Jim will vanish, and you'll be able to scroll around the level with the d-pad. When you get where you want to be, press A.
Weapons
Snarf the weapon of your choice with these codes. To use 'em, just pause the game and press the keys below.
Weapon Code
Plasma Gun C, C, C, C, A, A, A, B
3 Shot Gun C, C, C, C, A, A, A, C
Homing Gun C, C, C, C, A, A, B, A
Bubble Gun C, C, C, C, A, A, B, B
Nuke Gun C, C, C, C, A, A, B, C
Teleport Mucus Bomb C, A, B, C, A, B, Up, Down