Demon (Halo 3 achievement)
From Halopedia, the Halo wiki
Demon
Demon is a Halo 3 Meta-Game Achievement. It is earned when the player earns 15,000 points while playing the meta-game on Crow's Nest. This Achievement gives 10 Gamerpoints to the player.
It is represented by a blue circle with a horned skull.
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