M.D.K.

Hit the F1 key (to get to the help screen) before typing these in. Each code can be used once per level.
Then hit Esc or Enter to start playing again. Because of the many versions of MDK, these codes might not
work for some people.

healme - gives you full health
ineedabiggun - Gatt powerup
tornadoaway - Twister powerup
holokurtisfun - Decoy powerup
iliketolob - Mortar powerup
nastyshotthanks - Homing sniper grenade powerup
kill - suicide!