Halo 3

Promoted to Sergeant. Proven in combat, you are a Spartan.

Scored a Triple Kill with the sword in a ranked free for all playlist.

Killed 10 enemies without dying in any ranked free for all playlist.

Killed 3 enemies within 4 seconds of one another in a ranked free for all playlist.

Earned over 15,000 points in the Campaign meta-game on the first mission.

Destroyed a banshee with the spartan laser or missile pod in a ranked playlist or in campaign.

Claimed Tilt skull.

Claimed Catch skull.

Claimed Famine skull.

Claimed Fog skull.

Claimed Thunderstorm skull.

Claimed Tough Luck skull.

Killed 5 enemies by melee or assassination in a ranked free for all playlist.

Accessed all Terminals in the Campaign.

Claimed Mythic skull.

Claimed Black Eye skull.

Killed 10 enemies with headshots in a ranked free for all playlist or in campaign.

Claimed Iron skull.

Completed the Campaign on Normal difficulty.

Completed the final mission of the Campaign.

Completed the eighth mission of the Campaign.

Graduated from basic training. Stick with it to earn your Spartan Insignia.

Completed the seventh mission of the Campaign.

Killed 5 enemies with the needler in a ranked free for all playlist or in campaign.

Completed the sixth mission of the Campaign.

Completed the fifth mission of the Campaign.

Completed the fourth mission of the Campaign.

Completed the third mission of the Campaign.

Completed the second mission of the Campaign.

Completed the first mission of the Campaign.

Destroyed a vehicle that has three enemies in it in a ranked playlist or in campaign.