ODST may refer to the following:

• Orbital Drop Shock Trooper - An elite group of UNSC Marines under the supervision of NAVSPECWAR.
• ODST Ballistic Battle Armor - The vacuum-sealed armor worn by the ODSTs.
• Halo 3: ODST - A video game by Bungie that serves as a prequel to Halo 3.
• We Are ODST - A live-action short about the ODSTs.

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