A Halo 3 Halloween costume is designed to look like a character from the video game Halo 3. Costumes are worn during the celebration of Halloween. Halloween is a holiday celebrated in the United States and a few other areas in the world. Its origins are from the Druids who celebrated it as a way to honor their dead. The holiday takes place on October 31st every year.http://www.halloween-website.com/history.htm

Halo 3 is a video game in the Halo game series published by Microsoft Game Studios. It is a science fiction game.http://halo.xbox.com/en-us Some of the characters of the game are Master Chief, The Arbiter, Cortana, The Prophet of Truth, The Gravemind, Sgt. Major Avery Johnson and Commander Miranda Keyes.http://www.giantbomb.com/halo-3/61-9993/characters/

A Master Chief helmet can be made out of a motorcycle or bicycle helmet. Some 3-D style patterns can be cut from cardboard. The paint the cardboard to match the Chief's armor (some websites recommend coating the cardboard with Plasti Dip for a true effect) and then, before attaching it, consider taping it first to be sure it's a good fit. The rest of the Master Chief's armor pieces can be made the same way, using Velcro to attach them to clothing.http://www.instructables.com/id/Halo-3-Master-Chief-Halloween-costume/

Halo 3 costumes can often be found at retail stores and on the Internet at costume stores. The usual sizes for the costumes are boys, teens and adults.http://www.amazon.com/Halo-Costume-Teen-Boys-Mens/dp/B001EKIPZM Many costumes are a full body armor costume similar to the character Master Chief. Accessories such as gloves, energy swords and helmets are available.http://www.buycostumes.com/browse/_/N-/Ntt-halo+3/results1.aspx?REF=KNC-google&gclid=CMzaotfh-KQCFUHsKgod4hhbfw