Press [ESC], then the Team Chat key (L), then enter any of the cheats after / tell.
Deadly Dozen: Pacific Theater – Cheat Codes (English) Free Download
EXAMPLE: / tell godmode
godmode – God Mode
ammo – Guns No Longer Use Ammo
stats – Game Stats
fly – Fly Mode
invis – Invisibility
winmission – Win Mission
losemission – Lose Mission
give # – Give Item # (0-44)
fovs – Enemy’s Field of View