Presss ~ to open the console, then enter /svdevmap [map name] to load the level in single player mode. Then enter any of these codes in the console:
Effect Code All levels unlocked at skill 1 /iamacheater All levels unlocked at skill 100 /iamamonkey All weapons and ammo /give all God mode /god Hidden skin /model sarge/krusade No clip mode /noclip Spawn item /give [item name]
Contributed By: Starky27.
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