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Achievement- An in game task that carries a specific amount of Gamer Points. When completed, these points are added to a player's Gamerscore.
Avatar- A player's visual representation of what they look like on Xbox Live. They can be customized with clothing, accessories, and special items unlocked through Avatar Awards.
Avatar Award- A special type of Achievement that does not yield Gamer Points, but instead yields special items for a player's Avatar.