While playing, press [~] to bring up the console, then type any of the following codes:

GIFTFROMPTERODON --> Enable Cheat Mode
CHTHEAL --> Restore Health
CHTHEALTEAM --> Restore Health for Team
CHTWEAP # --> Get Weapon # (0-30)
CHTAMMO --> Refill Ammo
CHTGRENADES --> Get Grenades
CHTALLQF --> Access Quickfights
CHT3PV (0/1) --> 3rd Person View
SHOWFPS (0/1) --> Show FPS
SHOWPROF (0/1) --> Show Stats
CHTCANNIBALS --> Vietcong Wear Masks
CHTKOSTEJ --> Enemies Can't Hurt You