Were you looking for the achievement in Halo: The Master Chief Collection, or the music from Halo 3?
Legend is an achievement in Halo 2 Vista andHalo 2: Anniversary. It is worth 50 Gamerpoints and is obtained when you beat the campaign on Legendary Difficulty.
It is represented by the symbol of the Legendary difficulty; two combat knives crossed over a shield, with a Sangheili skull on top.
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