The cheat to unlock all quick play levels and challenges

Type in this cheat on the war room screen and you will unlock all the quick play and challenge levels: YXYYXYXXY and there you go!

The rocket launcher glitch for the field!

Okay, this glitch is really awesome! XD Ok, if your host picks the field this works! Go to the rocket launcher, and trade your main gun- not your pistol for it. Then, go back to the house not the barn the house and switch to your pistol. Then get the sniper rifle upstairs Switch back to your rocket launcher then wait for the sniper rifle to reappear and walk over it and then check your rocket launcher and you should have at least 6 rockets and if that's the case then just wait for the sniper again and get it again!

The Jungle glitch!

The jungle glitch is pretty obvious, but for u people that don't know it here it is!1) You find the tank.2) Go to the rock with the tree on the left of it. 3) Go to the little slope on that rock. 4) Press the < and ^ buttons and climb up it!