Halo3 Spartan laser Glitches & 1 Trick!

Infinite Spartan laser in Halo mission
Use the following trick to get a Spartan laser with unlimited ammunition in the "Halo" mission. Play through the level until you meet up with Sergeant Johnson. Shoot him until he falls down and drops the Spartan laser. Quickly pick it up, and shoot it at him. Keep shooting him until he kills you. When you respawn, knock 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. This laser should now have unlimited Spartan ammunition. This makes it easier to destroy the Guilty Spark 343. -From: Camuel


Super fast Spartan laser fire
In Forge mode, get a Spartan laser. Charge it until it is almost about to fire. Before you fire, turn into the Monitor. Fly around until you find a target. Before you turn back into a human, hold RT to fire the Spartan laser almost instantly (if done correctly). You can use the Monitor's aimer to aim the laser.

Easy experience in Multiplayer mode
Note: This trick requires four active accounts on your console that are all able to play on Xbox Live. Enter the matchmaking lobby, and choose "Social", then "Rumble Pit". Sign all four of your accounts in the lobby. In free for all modes, you have to be in the top three to earn experience points. Start matchmaking, and it should find two additional players. Once the game begins, you can simply do nothing. Once the game ends, all four of your accounts will tie for third place, giving all of them easy experience points. -From: Brandon Adkins