Press backspace & P and enter one of the following:
APOGEE - 16 bit colour mode
BOUF - Become invincable
TIM - Displays ''AWESOME''
GREETZ - Displays ''GREETZ''
AJRAN - Displays ''HAHAHA''
CHECK - Displays system info
GUNHED - Gives all weapons and refills your ammo
STRIKE - Gives you an airboard
BAD - Gives you an escort bird
DOOM - Gives you harder enemies
SABLE - Gives you the jumping shoes
HOOKER - Go to the bonus level
MARK - Kills you
KEN - Quicken the game
LAMER - Skips to the next level
HOCUS - Teleports you

View the Ending
To view the ending, press F10, F11 & F12 together at the level select screen.

Self-destructing enemies
If you enter the code ''DOOM'' 20 times in a row (code used to make enemies/items harder) then instead of all the enemies becoming impossibly hard, they destroy themselves! Whenever you see an enemy, they self-destruct! Also, whenever you see a weapon pick-up, or checkpoint sign, it will automatically act like you've already shot it!