Enable the console from the options menu. Press ~ (tilde) to bring up the console while playing. Type "devmap [mapname]" to load the level you wish to play. Once the level loads, bring up the console and type your desired cheat codes.
Map Names:
Code: Level:
mak Semper Fi
pel1 Little Resistance
pel2 Hard Landing
sniper Vendetta
see1 Their Land, Their Blood
pel1a Burn 'em Out
pel1b Relentless
see2 Blood and Iron
ber1 Ring of Steel
ber2 Eviction
pby_fly Black Cats
oki2 Blowtorch and Corkscrew
oki3 Breaking Point
ber3 Heart of the Reich
ber3b Downfall
nazi_zombie_prototype Nacht der Untoten
Cheat Codes:
Code: Result:
god God Mode
give all All Weapons
notarget Disable AI
noclip No Clipping Mode