To enter the cheat codes, press the tilde key (~) during gameplay and enter the code of your choice:
(NOTE: # in a cheat code means to put a NUMBER in place of #. Example: setspeed 5)

• upgrademe # : Level of upgrades (# is a number between 1 and 4)
  
• xgod : Take no damage (Toggles on/off)
  
• allammo : Full ammunition
  
• killpawns: Kill all enemies
  
• xfly : Flying mode (jumping moves you up and you do not fall back to the ground)
  
• xghost : Noclip mode (go through walls, floors, above the map, under the map -- go through anything)
  
• xwalk : Flying/noclip mode off (turns off xfly or xghost)
  
• setjumpz # : Set jump height (z-axis), 500 is the default value
  
• setspeed # : Set movement speed, 2 is the default value
  
• summon : Summon model
  
• icandoit : Beat This Level mode
  
• open map## : Open map (## is a number between 00 and 40)
  
• superhealth : Recharge health by 10%

Tired Of Flying?

All right, listen up! Press ~ and enter the cheat code xfly. Then, enter the cheat code xgod too. Press ~ again. It's amazing! You fly when you jump! You can fly as high as you want, depending on how long you hold the JUMP key. Play the game for a little while... If you get tired of flying, just press ~ and enter xwalk. Press ~ again. You're back on the floor. You can run and jump normal again. If you're up in the air and you enter xwalk, don't be afraid when you fall, because you'll survive the fall if you followed the directions I gave you correctly.