Cheat codes:
In the game, press Escape, then type (not too fast or too slow and no pausing):

Code Result:
ucantkillme Activate God Mode (Only for Bob, not the Host)
fleshnblood Deactivate God Mode
braindead AI Off
einstein AI On
icantsee AI Vision Off
icanseeu AI Vision On
freezecam Freezes Camera
thawcam Thaws Camera
toohardforme End Current Game
charwireon Character Wireframe On
charwireoff Character Wire Off
worldwireon World Wireframe On
worldwireoff World Wireframe Off
onpolycount Polycount On
offpolycount Polycount Off
gamespot Spawn Weapon Ammo
voodooextreme Spawn Bazooka
softwarebuys Spawn Grenades
weldme Spawn Welding Torch
buzzbuzz Spawn Buzzsaw
boomstick Spawn Pumpgun
rapidfire Spawn Machinegun
slicendice Spawn Maimer
lightmeup Spawn Flamethrower
cooloff Spawn Pak Gun
bigbang Spawn Bazooka
coolfx Spawn Maser
stickaround Spawn Harpoon Gun
illbeback Spawn Weapon Ammo
getsome Spawn Grenades
lcop Spawn Light Cop
mcop Spawn Medium Cop
hcop Spawn Heavy Cop
rcop Spawn Riot Cop
guncmndr Spawn Gun Commander
incharge Spawn Domina
mynightmare Spawn Armored Behemoth
cantseemyface Spawn Welder
workinman Spawn Worker
egghead Spawn Scientist
glowstick Spawn Radiation Worker
heydoc Spawn Medic
smellyguy Spawn Chot 1
nohygiene Spawn Chot 2
idontdance Spawn Chot 3
scumbucket Spawn Chot 4
chotling Spawn Chot Dwarf
smellysteroids Spawn Chot Behemoth
fungirl Spawn Fungirl
workit Spawn Prost 1
mansdream Spawn Prost 2
specialguy Spawn Hung
averagejoe Spawn Male Dweller 1
averagejack Spawn Male Dweller 2
averagejohn Spawn Male Dweller 3
janeplain Spawn Female Dweller 1
jillplain Spawn Female Dweller 2
femfatale Spawn Subgirl 1
nastyone Spawn Subgirl 2
varmint Spawn Rat
bestfriend Spawn Barman
bringmeadrink Spawn Waitress
bustamove Spawn Dancer 1
cutarug Spawn Dancer 2
mixalot Spawn DJ
tophat Spawn Pimp Daddy
onsteroids Spawn Behemoth
addedfirepower Spawn Offensive Bot
keepmecompany Spawn Companion Bot
letmein Spawn Bouncer