Spartan Officer
From Halopedia, the Halo wiki
Spartan Officer
Spartan Officer is a Halo 3 Multiplayer Achievement. It is earned when the player advances to the rank of Lieutenant (70 won ranked or social matches and rank 10 in any ranked playlist) on Xbox Live. This Achievement gives 25 Gamerpoints to the player and unlocks the Rogue Armor Armor Permutation.
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