Iron (achievement)
From Halopedia, the Halo wiki
Iron
Iron is a Halo 3 Campaign Achievement. It is earned when the player finds the Iron Skull. This Achievement gives 10 Gamerpoints to the player.
It is represented by a blue circle with a skull in the middle. The skull has a hammer on its forehead.
Effect: When either player dies in Co-Op on any difficulty both players will restart at last check point.
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