Weaponless Elite glitch

The Weaponless Elite glitch is a glitch which can be done on the Halo 2 levels Metropolis and Gravemind.

How to do it

Metropolis

Go to the level Metropolis in Halo 2 and board the Scarab. Throw a plasma grenade at the Scarab operator Elite while he is operating the Scarab. He will will make the animation for an Energy Sword but won't have one. Easy is the best difficulty for this.

Gravemind

Get the Catch and Sputnik skulls and go to the level Gravemind. Make sure that the difficulty is on Easy. Go to the first outdoor area past the Hunters where the Honor Guard Elites and the Brutes are fighting. Get the SpecOps Elite toward the right to throw a plasma grenade at you. You should take out the sniper Jackals before attempting. Either shoot a Brute Shot at the Elite's feet or jump above his head, but just enough so he doesn't stick you, to make him throw the plasma grenade up in the air. If you did it correctly, the plasma grenade will land on his head and not you, and he will do the animation for pulling out an Energy Sword. Don't worry, he won't pull one because he's a Special Operations Elite and they aren't scripted to have a secondary weapon. Instead, he will pull out an invisible Energy Sword and will follow you around the Valley of Tears. When you reach the part where the Flood-controlled In Amber Clad comes, he will not follow you across the light bridge but stand there staring at you.

Explanation

Because the Elite's grenades are weaker than yours, it will not kill him but will make him do the animation for the Energy Sword, causing him to become "Weaponless".