Halo 3 skulls allow gamers to make the game more challenging or interesting. They can do things such as: Change dialogue, appearance and physics as well as game play. These skulls can however can cause much frustration. Since they are located out of the way in many levels, gamers may not know where to look for them, since they are always located out of the way. There are however different walkthroughs available for them, to be able to help them to locate all of the skulls.

All together there are 13 skulls that can be found, but there are two different categories of skulls. You have your Gold Skulls, which in general can change game play and allow the gamer to make it more challenging. There are 9 gold skulls in total and when a gold skull is first found, the gamer will receive 10 gamer points. If the gamer is able to collect all 9 skulls, then he or she will have unlocked the body and shoulder Hayabusa armor pieces.