Vietcong: Purple Haze Cheat Codes for Playstation 2

Unlock all missions and weapons
Highlight Credits on the main menu and press L2, R2, Square, Circle

God Mode
During a mission press L2, R1, X, Down

Shooting difficult to hit far away enemies
Look at the enemy through binoculars. Center the enemy in your binocular sights, then switch back to your rifle. The rifle will now be trained on the enemy. Fire a three round burst and you will usually take him out.