:king: Infinite Spartan Laser Ammo Cheat
Use the following trick to unlock a Spartan Laser with unlimited ammunition in the "Halo" mission. Play through the level until you meet up with Sgt. Johnson. Shoot him until he falls down and drops his Laser. Quickly pick it up, and shoot him with it. Keep shooting him until he kills you. When you respawn, shoot him down again, and pick up his Laser. He should get back up with another Laser on his back. When he does, shoot him down again, and pick up the new gun he drops.