� As you fly into the level "343 Guilty Spark" in the pelican, repeatedly tap the L button on your controller. When the pelican begin to lower tot he ground to drop you off, you will eventually throw a grenade, which will enable you to stay in the pelican. The pelican will eventually take off again, and continue to where it goes after its suppose to drop you off. After the dropship lands on the untextured mountain with 2D trees on it, press X to exit the pelican. Continue in the dirrection at which the pelican's nose points and along the mountain's edge as you come across it. Do NOT drop off of the mountain edge yet, it just brings more work apon yourself which is just no good. You will eventually come across the structure you were suppose to go through the swamp and find, drop down, covenant will run out (just a few grunts and jackals), along with a few floating Assault Rifles. Dont worry about it, its just a glitch because you made it to the structure sooner than you were suppose to, they will dissapear in a few seconds. Finishe off the little covenany bastard and make your way into the structure and through the rest of the level. Congratulations, you've just figured out a glitch that saves time, ammo, and the trouble of having to make your way through that swamp.

� When you are going through the "The Two Betrayals" stage, your objective is to destroy all the generators. Now is the time you get to take the co-op system to your advantage. If you've noticed, during co-op, you come across many annoying warp points that either piss off you or the person you're playing with, but dont hate it just yet, it has an advantage, especially in this level. In the hallways of the structure that lead to the generators, there is a warp point, take some time and learn where the warp point is for when you're suppose to be leaving the structure. Once you've figured out where the spot is, have one player stand right before it. The other player should now run in, jump into the generator and destroy it, as soon as the player does so, and loses his shield, have the player at the warp point walk through it, warping the playing inside the structure to the hallway, making it both players can leave relatively unhurt, depending on how much health you had when you got there. Do this with all 3 generators and the warping affect will eventually prove its use to you.