While in halo there are no actual cheat codes for example an xbox halo cheat codes that makes your player invincible does not exist, however there are xbox halo cheat codes that allow your character to beat down faster, shoot more rapid, and reload faster.

Xbox halo cheat codes #1: The first of our cheat codes is to reload faster. To do this you must hit "x". Then when you see your character start to put a clip into your gun hit "b" this will cancel the end animation of reloading and you will have a full clip of ammo.

Xbox halo cheat codes #2: The next cheat code is to beat someone down faster. All you have to for this cheat code is to press "b" "y" "b". Note: you must have a secondary weapon.

Xbox halo cheat codes #3:  This isn't much of a cheat code, but more of a tactic. This is something you would use if you are in a warthog by yourself and you see an enemy that you want to kill. All you do is start driving fast, then press the right bumper "RB" then continually press RB this will allow you to get into the turret and gun down your victim.

Xbox halo cheat codes #4: The last cheat code I discovered is if you press the Right Trigger two times very fast you will shoot two bursts with your Battle Rifle.