Press backspace & P and enter one of the following:-gives you an escort bird
Code Effect APOGEE 16 bit colour mode BOUF Become invincable TIM Displays ''AWESOME'' GREETZ Displays ''GREETZ'' AJRAN Displays ''HAHAHA'' CHECK Displays system info KEN Exits the game 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 speed shoes effect HOOKER Go to the bonus level MARK Kills you 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.
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!
Contributed By: MrGuru.
Christmas theme and bonus holiday levels
When playing the game from November through to January, the game will have a Christmas snow theme for the game menu. During this time, a bonus playable chapter called 'Holidaus' is avaliable for play, featuring several stages of Christmas themed gameplay.
Make sure your computer's clock is set to the correct date for the effect to take place, or you can just set your computers clock to December to unlock these extras when not in the season.
Contributed By: Stejpan.
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You can submit a problem report for any non-working or fake code in the lists above.