Cheat Codes
First you must press the " ~ " key and then type in the cheats below:
give all
give health
give weapons
give ammo
give armor
give body armor
god notarget
noclip
give jacket armor
give blaster
give shotgun
give super shotgun
give machinegun
give chaingun
give grenade launcher
give rocket launcher
give railgun
give bfg10k
give shells
give bullets
give cells
give grenades
give rockets
give slugs
give quad damage
give invulnerability
give silencer
give rebreather
give environment suit
give ancient head
give adrenaline
give bandolier
give ammo pack
give data cd
give power cube
give pyramid key
give data spinner
give airstrike marker
give blue key
give red key
give security pass
give commander's head
give power shield
give armor shard
give combat armor