Scarab boarding glitch

The Scarab Boarding Glitch is a glitch present in the Halo 3 Campaign level The Storm. The glitch allows players to board the Scarab earlier.

Instructions
Start the level from the beginning. When you reach the first Anti-Air Wraith, kill all enemies except the Anti-Air Wraith's driver. On Easy and Normal, the AA Wraith's pilot will be busy trying to kill the NPC Hornet, so meleeing the side "wings" off of the Wraith and hijacking it should be an easy task. Drive the Wraith into the next lakebed and kill all enemies.

When you reach the Judgment chapter, save and quit. Then resume the mission. After this checkpoint, do not save and quit.

Position the Anti-Air Wraith where the Troop Transport Warthog is. When the Scarab's leg comes down on your position, press LT to boost; the Wraith will be sent flying into the air. If you dismount the Wraith at the right time, you should land on the Scarab's deck. This may take a couple of tries, as the Wraith's position is a significant factor; if you do not end up on top of the Scarab, then press the Xbox Guide button, sign out, and resume the mission.

If the Wraith does not move from its position when the glitch is performed, the glitch may overload the map. This will lag the game. Eventually, the overloading will remove all NPCs save for the Hornets and Pelican (and that does include the Scarab); sometimes, it will even prevent the Arbiter from spawning.