Press T during gameplay, then enter one of the codes listed below to activate the cheat:

Full armor -- armor

God mode -- god

Full health -- health

Full ammo -- ammo

Get Skillpoints (level 3 to 4) -- skillz

All weapons -- guns

Invisibility -- poltergeist

Level skip -- maphole

View position -- pos

View version number -- build

Scope and zoom mode -- mods

Spawn snowmobile -- rosebud

Bigger blasts -- baddaboom