Type bod then press [Keypad Minus] to enable cheat mode. Then, type one of the following codes followed by [Keypad Minus] to activate the corresponding cheat function.

Code - Effect
mrbenn Level - skip
zippy - God mode
babapapa - Extra credits
crystaltips - Extra life
albertofrog - Grenade boost
bucketofchicken - Rear view
dunky - Enter high score
triz - Display polygon information
bing - Disable cheat mode
calypole - 20 air strikes
pipkinz - 20 gas grenades
bungle - Timer always reset to 60 seconds