Press T and enter one of the following codes:
God mode: mpimyourfather
All armor options: mpyoulooklikeyouneedamonkey
All weapon upgrades: mpgoattech
All weapons and full ammo: mpkingoftehmonstars
Infinite ammunition: mpwegotdeathstar
Complete current mission: mpmaphole
Restore armor: mpwonderbra
Restore health: mpdrdentz
Spawn snow: truckmprosebud
Third person view: mpasscam
Position display: mppos
Display game version: mpbuild
Exit game: mpmiked