Golden Touch

Golden Touch is a glitch that can be performed in the Halo 2 level, Quarantine Zone.

Walkthrough
Play the level Quarantine Zone on Legendary. Make your way through all of the Flood until you get to the Gondola. After the cutscene, hide while your allies are killed. After they are killed, kill all the Flood on the Gondola before It reaches it's destination. Now the Arbiter will either turn black or a type of golden green. Once this happens the weapons you are wielding and any weapon you pick up will turn into the color of your character.