Cheat Mode
While playing a game, press T:

Result - Code:

Restore armor - mpwonderbra
Restore health - mpdrdentz
Show game version - mpbuild
Spawn motorcycle - mpracerboy
Spawn snowmobile - mprosebud
God mode1 - mpimyourfather
Toggle position display - mppos
Toggle third person view - mpasscam
Temporarily invisible to the camera - mpcam
Unlimited ammunition - mpwegotdeathstar
Walk through walls - mpclip
Ohio teaser - mpgod
All maps - mpbeenthere
Trigger all activate boxes - mptriggers
Remove all AI players - mpboyisuck
Toggle invisibility - mpwhoami
Third person view - mpcamera
Press (Keypad Plus) to return to start of level - mpteleport
All armor options - mpyoulooklikeyouneedamonkey
All weapon upgrades - mpgoattech
All weapons and full ammo - mpkingoftehmonstars or mpmimimi
All weapons, ammo and items - mpsanta
Current mission completed - mpmaphole
Exit game - mpmiked
Gore mode - mpexorbitantamounts
Paintball mode - mpflowerpower