Destroyed a banshee with the spartan laser or missile pod in a ranked playlist or in campaign.
Claimed Famine skull.
Claimed Fog skull.
Claimed Catch skull.
Claimed Tough Luck skull.
Claimed Black Eye skull.
Claimed Iron skull.
Destroyed a vehicle that has three enemies in it in a ranked playlist or in campaign.
Killed 5 enemies with the needler in a ranked free for all playlist or in campaign.
Complete a Cooperative Story mission with at least one other player
Promoted to Sergeant. Proven in combat, you are a Spartan.
Unlock by beating stage 1 in any difficulty mode.
Killed 3 enemies within 4 seconds of one another in a ranked free for all playlist.
Graduated from basic training. Stick with it to earn your Spartan Insignia.
Killed 5 enemies by melee or assassination in a ranked free for all playlist.
Earned the MVP in a ranked playlist.
Completed the Campaign on Normal difficulty.
Completed the final mission of the Campaign.
Completed the eighth mission of the Campaign.
Completed the seventh mission of the 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.
You have completed the story.
You completed the mission "I'll Take Her".
You completed the mission "That Special Someone".
You completed the mission "Museum Piece".
You unlocked all the islands.
You got a turkey in 10-pin bowling.
You successfully lost a 4 star wanted rating.
You completed the mission "Roman's Sorrow".
You unlocked the special ability of buying guns from Little Jacob.
You beat a friend at pool.
You scored 180 with 3 darts.
You made a taxi trip from one island to another without skipping.
You completed the mission "Uncle Vlad".
You were invited into your girlfriend's house.
You unlocked the special ability of Roman's taxi.
You have amassed a fortune of $500,000.
You beat the high score in QUB3D.
Complete "Cure For Most of What Ails You" and "Get Back in that Hole, Partner" Survivor Missions.
Complete "At Home with Dutch".
Complete "An Appointed Time".
Complete "The Gates of El Presidio".
Purchase a rare weapon from a gunsmith.
Get 250 headshots in any game mode.
Kill 500 enemies with any rifle, repeater, or shotgun in any game mode.