General Tips

1. To get out of the intro scene and into gameplay quickly press (X) before or during the scene.

2. The best way not to get hit by a mob of terrorists (5 or more) in to move around in circles or you own patterns while firing back.

3. Be careful of where you aim you weapons so you won't harm CBCD Agents (They're your best and only backup!)

4. If you use your taser on a CBCD agent during or after their death, other agents will try to kill you.

5. If you're concerned about saving ammo in a game like this remember to use the head method. Use manual aim and head for the head of the enemy.

6. Shoot out spotlights/street lights/ or anything that has light ahead of time. That way the enemy won't be able to spot you as fast as he would.

7. Another way to save ammo is by using your taser. The pros to it is that ic an kill the enemy by enflaming them to death. The cons to it is that if you use the taser on one target for a certain time your vulnerable to other lurking enemies.

Stealth Tips
When a guard is on a route (walking back and forth). Hide behind a wall and hold L1 to manual aim. Then hit L2 or R2 to do a quick pop out. Then you simply shoot the heck out of the guard then let go of the buttons.

Instead of using your R1 auto aim, use the L2 manual aim. Wait until the screen says "head shot" then fire. You will use only 1 bullet and it kills him on the first shot.
When using stealth; shoot out spotlights so guards can't see you. If a gaurd is by a spotlight. then snipe-out then gaurd fisrt, and then shoot the spotlight.

Cheat - One Bullet Kills
Go into the game and press start. Then go to weapons and highlight the 9mm then press and hold LEFT, L1, R2, SELECT, SQUARE, X, O.

Cheat - All Weapons & Infinite Ammo
Pause the game and highlight the Weapons menu. Now press and hold RIGHT + L2 + R2 + CIRCLE + SQUARE + X.

Cheat - Hard Difficulty
At the title screen press and hold Left, L1, R2, Select, Square, Circle, and X. The word "dammit" will confirm the code.

Cheat - Level Select
Pause the game, go into the Options menu. Highlight the Select Mission option, then press and hold LEFT + L1 + R1 + SELECT + SQUARE + X.