Hordes of Hell proving a bit much for you? Just really want to blow some stuff up? These are for you. During gameplay hold Ctrl+Alt+tilde [~] to drop the command console, then enter these codes to hook it up.
Cheats
All Keys give keys
All Weapons, Ammo, Health, and Armor give all
Freeze Everything Onscreen freeze
God Mode god
Most Enemies Wont Attack notarget
Pass Through Objects noclip
Levels
Type "devmap game/[map name]" in the console to teleport yourself to the beginning of whichever map you want. The levels are listed in order.
marscity1.map
mcunderground.map
marscity2.map
admin.map
alpha1.map
alpha2.map
alpha3.map
alpha4.map
enpro.map
commout.map
communications.map
recycling1.map
recycling2.map
monorail.map
delta1.map
delta2a.map
delta2b.map
delta3.map
delta4.map
hell.map
delta5.map
cpu1.map
cpuboss.map
site3.map
caverns1.map
caverns2.map
hellhole.map
Monsters
Type "spawn monster_[name]" to spawn the monster right in front of you. The type of monster spawned should be fairly obvious. Note that Hellknights and Archviles are bad for your health consider using the notarget or god codes so youre not quite as doomed.
boss_cyberdemon
boss_guardian
boss_guardian_seeker
boss_sabaoth
boss_vagary
demon_archvile
demon_cherub
demon_hellknight
demon_imp
demon_maggot
demon_mancubus
demon_pinky
demon_revenant
demon_tick
demon_trite
demon_wraith
zombie_bernie
zombie_commando
zombie_commando_cgun
zombie_fat2
zombie_fat_wrench
zombie_jumpsuit
zombie_jumpsuit_eating
zombie_labcoat
zombie_limb
zombie_maint_bald
zombie_maint_nojaw
zombie_maint_skinny
zombie_maint_wrench
zombie_maint
zombie_maint2
zombie_maint_flashlight
zombie_pipe
zombie_sawyer
zombie_skinny
zombie_suit_neckstump
zombie_suit_bloodymouth
zombie_suit_skinny
zombie_tshirt_bald
zombie_tshirt_blown
zombie_zsec_machinegun
zombie_zsec_pistol
zombie_zsec_shield
zombie_zsec_shotgun
Powerups
Adrenaline spawn powerup_adrenaline
Berserk give berserk
Megahealth spawn powerup_megahealth
Invisibility spawn powerup_invisibility
have fun