Activate all cheats:
Enter BEWAREOBLIVIONISATHAND as a code to activate invincibility, all weapons, unlimited ammunition, and the minor cheat codes. If a multi-player game is started after the code is activated, you may pause game play and select any single player level to allow both players to go through the game together.

Opponents have big heads:
Enter UBERNOODLE as a code.

Stick man:
Enter HOLASTICKBOY as a code.

Big hands and feet:
Enter STOMPEM as a code.

Small opponents:
Enter PIPSQUEAK as a code.

Pen and ink graphics:
Enter IGOTABFA as a code.

Blackout mode:
Enter LIGHTSOUT as a code.

Frootie stripes:
Enter FROOTSTRIPE as a code.

Gouraud shading:
Enter WHATSATEXTUREMAP as a code.

Juan's cheat:
Enter HEEERESJUAN as a code to place a face on the gold diamonds.

Zach's cheat:
Enter AAHGOO as a code to turn the diamonds blue with a baby's face.

View credits:
Enter ONLYTHEBEST as a code.

Invincibility glitch:
Stand in front of a save portal with very little health. Allow your character to be killed and pushed backwards into the portal in the same attack. Save the game, then return. If done correctly, your character should be at zero health but still be able to play without getting any further damage. Collecting health will negate this effect. Note: Pressing Start has no effect while this glitch is active.

Multi-player invincibility:
Select a level with portals and Scorpion Launchers, such as Teleportastic. Have a second player meet your character at the portal. Stand directly in front of the portal and have the second player take your character's energy out to about ten of fifteen. Remain directly in front of the portal and have the second player shoot your character into the portal with a Scorpion Launcher. The second player will be awarded a kill each time your character passes through the portal. Do not collect any health to keep your character at zero.