Become an intricate part of the interstellar war between 26th century humanity, led by the United Nations Space Command, and a collection of alien races known as the Covenant in our Halo 3 Master Chief Halloween Costume. As cybernetically enhanced supersoldier Master Chief Petty Officer John-117 must keep the Covenant from destroying human life as we know it. You will be a fierce competitor when you wear the Halo 3 costume with green colored jumpsuit of ?armor? and helmet. We offer this costume in multiple styles and sizes. Featured sizes are X-small, Standard and XL. There are multiple accessories to take the Halo 3 costume to the next level. These accessories available for purchase include: Halo 3 Gloves, Deluxe Bullet Belt with Silver Plated Bullets, Halo 3 Master Chief 1/2 Mask Adult, Halo 3 Master Chief 2 piece Vacuform Mask, Super Hero (Black) Adult Boots and Face Painting Makeup Disguise Stix. Halo 3 has been one of the highest grossing video games in history. Keeping the Covenant from destroying human life and the remainder of the resistance is your mission. Only by activating the seven halos can you save the human race. Embark on this journey in the Halo 3 Costume.