Spartan Officer

Spartan Officer is a Halo 3 multiplayer achievement. It was earned when the player gained 50 experience points in a certain playlist and a rank of at least on Xbox LIVE. It is represented by a gold plate with an eagle holding three black arrows and a black thunderbolt, with three pips behind it.

Following the shutdown of Xbox 360 Halo online services on January 13, 2022, this achievement is no longer attainable.

Rewards
Unlocking this achievement rewards the player with the following;
 * Rogue multiplayer armor permutation for player use.
 * Rogue multiplayer armor permutation for player use.

Glitches

 * Some players reported that they got the achievement at the same time as the Vidmaster Challenge: Lightswitch Achievement, and it didn't go through. Others did not get the achievement when advancing to a Highest Skill of 10, skipping last ranks and going straight to.
 * If a player obtained the Spartan Officer Badge but didn't get the achievement, they could still obtain the achievement by getting a lieutenant rank in any of the new playlist-specific ranking systems.