Vietcong: Purple Haze Cheats (PlayStation 2)

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 them out.

While playing a game, press L1 + R1 + X + Down.

Go to the main menu and highlight credits. Then enter L2, R2, SQUARE, CIRCLE.

Always use a snipers rifle. This seems to work the best, because you can stay low and pick
your targets. If it gets too hot, send your team. If you tell them to spread out, it works
better than an attack.