While playing, press UP, UP, DOWN, DOWN, LEFT, RIGHT, LEFT, RIGHT, B, A. 'God Activated' will appear to confirm you've done it correctly. You will now be invincible. Enter this code again to deactivate the cheat.

Laser Trail Code:

During gameplay, press UP, DOWN, UP, DOWN, R-CLICK, R-CLICK. Your weapons will shoot blue laser trails, and enemy weapons will shoot red laser trails.

Hidden credit map:

In the menu: Push left stick, push left stick, push right stick, push right stick, X, Y, B, A, B, A

Unlock new levels in Team Survival:

In order to play on maps that are not part of team survival, create a room on xbox live, when it asks you for a game type pick mission. When it asks you to pick a board highlight Import/export. Once highlighted hit ''B'' to cancel it. This will take you back to the screen where you set the game up. This time change the game type to Team Survival. and pick the import/export map. And start the room. when you play the game you will be in a different map from the regular import export map. This trick only works on a few of the zones. Also know that when you do this both teams will spawn in the same location.

Increase Your Co-op Stats:

If you want to increase your stats on cooperative try the following:

     » Use your secondary weapon
     » Use a supressed weapon
     » Don't use smokes
     » Make sure everyone on your team finishes
     » Make a terrorist surrender

Note: These tactics are hard to achieve and if your just starting out you should probably get some practice first before attempting these suggestions.

Hints:

• Learn to shoot while moving. A moving target is a lot harder to hit then a still target.
• Make sure you make good use of your thermals especially when you see smoke.
• Learn to lean over and shoot without exposing yourself completely
• Throw your enemy off by throwing a grenade away from your position.
• Watch out for players who glitch through walls. Look our for them and Report them.
• If you think someone is behind a door shoot at it, the bullets will go through.