Ok basically we just say fake ridiculos cheats that DEFINATLY WOULD NOT HAPPEN! so do not try them or the outcome is pretty bad sometimes. Ok i'll start.
Be Cortana,
first go to the great journy. when you get to the part where you first encounter the hunters, shoot all of them. when you fire the last shot, take out the game and throw it out the window. then go retrive your game and yell, "I AM THE OTHER WHITE MEAT!" at the top of your lungs thrity times. put the game back in and wait for it to load. go to the same level andd you will notice all the hunters are now Marines. Melee them all once aand they will explode. When the smoke clears MC and cortana will kill you. You are now Cortana. You can go through walls and randomly blow people up. your life is infinate.
I used to be on this site a long time ago, and now I've made my return!