Vidmaster Challenge: 7 on 7

Entered into a ranked or social playlist with 7 EXP on the 7th of the month.

Two for One

Scored a Double Kill with a single spartan laser shot in a ranked free for all playlist.

Delicious Brains

On a Mythic map, infected 2 humans during a ranked or social match.

Have Fun Respawning

On a Mythic map, got an Extermination during a ranked or social match.

Post Mortem

On Orbital, got 2 Death From the Grave medals during a ranked or social match.

Pull

On Citadel, got a Shotgun Spree during a ranked or social match.

Killtacular

On a Mythic map, got a Killtacular during a ranked or social match.

Vidmaster Challenge: Lightswitch

Got the rank of Lieutenant in any playlist in the new EXP progression system.

Spartan Officer

True veteran of many battles, you are a Spartan Officer.

Save This Film

On a Mythic map, got a Perfection medal during a ranked or social match.

Look Both Ways

On a Legendary map, got a Splatter Spree during a ranked or social match.

Zombie Repeller

On a Mythic map, killed 2 Zombies during a ranked or social match.

Hammer Time

On Assembly, got 5 Hammer kills during a ranked or social match.

… Get the Horns

On a Mythic map, got a Bulltrue medal during a ranked or social match.

Blades of Fury

On Heretic, got a Sword Spree during a ranked or social match.

Ghost Patrol

On Longshore, got 3 kills with a Ghost during a ranked or social match.

Awww, Too Bad

On a Mythic map, got a Killjoy medal during a ranked or social match.

Tank Dropper

On a Mythic map, got a kill on another player while in monitor mode.

Vidmaster Challenge: Brainpan

Found all the hidden skulls on the Mythic maps.

Heretic Skull

On Heretic, found the hidden skull.

Citadel Skull

On Citadel, found the hidden skull.

Longshore Skull

On Longshore, found the hidden skull.

Assembly Skull

On Assembly, found the hidden skull.

Orbital Skull

On Orbital, found the hidden skull.

Sandbox Skull

On Sandbox, found the hidden skull.

Alas, Poor Yorick

On a Legendary map, got 3 Oddball melee kills during a ranked or social match.

Vidmaster Challenge: Annual

After 9/25/08, completed Halo on 4-player Legendary LIVE co-op, with Iron, and everyone in Ghosts.

Maybe Next Time Buddy

Boarded the same vehicle within 10 seconds after being boarded in any free for all playlist.

Mongoose Mowdown

Splattered an enemy with the mongoose in a ranked free for all playlist.

Fear the Pink Mist

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

Defend This

On a Legendary map, got a flag melee kill during a ranked or social match.

Overkill

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

Steppin' Razor

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

Triple Kill

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

Killing Frenzy

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

Too Close to the Sun

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

We’re in for some Chop

Destroyed an enemy vehicle with equipment in a ranked playlist or in campaign.

Headshot Honcho

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

Lee R Wilson Memorial

Scored 5 grenade sticks in any ranked free for all playlist.

Up Close and Personal

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

Flag Dropped

On a Legendary map, got 2 flag carrier kills during a ranked or social match.

Road Rage

On a Legendary map, got 5 Warthog chaingun kills during a ranked or social match.

UNSC Spartan

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

Came… From… Behind

On a Legendary map, got 3 assassinations during a ranked or social match.

Double Double

On a Legendary map, got two Double Kills during a ranked or social match.

Graduate

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

MVP

Earned the MVP in a ranked playlist.

Return

Completed the final mission of the Campaign.

Campaign Complete: Heroic

Completed the Campaign on Heroic difficulty.

The Road

Completed the third mission of the Campaign.

Catch

Claimed Catch skull.

Cleansing

Completed the fifth mission of the Campaign.

Mythic

Claimed Mythic skull.

Cavalier

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

Demon

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

Refuge

Completed the sixth mission of the Campaign.

Guerilla

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

The Key

Completed the eighth mission of the Campaign.

Thunderstorm

Claimed Thunderstorm skull.

Campaign Complete: Normal

Completed the Campaign on Normal difficulty.

Assault

Completed the fourth mission of the Campaign.

Last Stand

Completed the seventh mission of the Campaign.

Tough Luck

Claimed Tough Luck skull.

Holdout

Completed the second mission of the Campaign.

Tilt

Claimed Tilt skull.

Used Car Salesman

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

Famine

Claimed Famine skull.

Iron

Claimed Iron skull.

Black Eye

Claimed Black Eye skull.

Fog

Claimed Fog skull.

Landfall

Completed the first mission of the Campaign.