That Metal Show - 2008 Overkill 3-4 was released on:
USA: 24 October 2009
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Overkill is the perk that lets you gave two primary weapons.
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To earn the Overkill Achievement in Halo 3, you must win the Overkill medal (kill four players within four seconds of each other) in a ranked free-for-all matchmaking playlist such as Lone Wolves.