Complete the following achievements to unlock Xbox Live Gamerscore points.

Achievement	How to unlock
A Legendary Episode (40 points)	Completed all chapters in Spartan Ops Episode 1 on Legendary difficulty.
Armorer (5 points)	Changed your Spartan's armor in the Spartan Armor card.
Badge (5 points)	Changed your Emblem in the Spartan ID card.
Bromageddon (40 points)	Completed the Campaign cooperatively on Heroic or harder.
Bropocalypse (10 points)	Completed any Campaign mission cooperatively on Heroic or harder.
Bros to the Close (20 points)	Completed mission 4 without one preventable Marine death on Heroic or harder.
Chief, Smash! (20 points)	Killed 3 Crawlers in one hit with the Gravity Hammer in mission 8.
Composer (10 points)	Completed mission 7 on any difficulty.
Contact the Domain (10 points)	Found a Terminal in the Campaign.
Crimson Alone (20 points)	Completed a Spartan Ops chapter solo on Legendary.
Dawn (10 points)	Completed mission 1 on any difficulty.
Dedicated to Crimson (80 points)	Completed all chapters in the first 5 episodes of Spartan Ops on any difficulty.
Digging up the Past (20 points)	Found and accessed Chief's record in mission 1.
Explore the Floor (20 points)	Tricked or forced a Hunter to fall to his demise in mission 6.
Forerunner (10 points)	Completed mission 3 on any difficulty.
Game Changer (5 points)	Created and saved a Custom Game type in War Games.
Give Him the Stick (20 points)	Took out both Hunters using only the Sticky Detonator in mission 7.
Hanging on the Combat Deck (30 points)	Won 20 War Games matchmaking matches.
I <3 Red vs Blue (15 points)	Won 5 War Games matchmaking matches.
I Need a Hero (40 points)	Completed the Campaign on Heroic or harder.
Infinity (10 points)	Completed mission 4 on any difficulty.
Knight in White Assassination (20 points)	Assassinated a Knight in any Spartan Ops mission.
Lone Wolf Legend (90 points)	Completed the Campaign solo on Legendary difficulty.
Midnight (10 points)	Completed mission 8 on any difficulty.
Midnight Launch (20 points)	Got significant air in the Warthog at midnight in mission 2.
Mortardom (20 points)	Hijacked a Wraith and used it to kill at least four enemy Wraiths in mission 5 on Heroic or harder.
Movin' On Up (25 points)	Ranked up your Spartan-IV to SR-20.
No Easy Way Out (20 points)	In Ch 1, Ep 5 of Spartan Ops survived the enemy assault during the defense on Normal or harder.
No One Left Behind (20 points)	Saved at least one Marine in Chapter 3 of Episode 2 of Spartan Ops on Heroic or harder.
Not Some Recruit Anymore (15 points)	Ranked up your Spartan-IV to SR-5.
Operation Completion (15 points)	Completed a Spartan Ops Mission on any difficulty.
PWND (5 points)	Changed your Service Tag in the Spartan ID card.
Reclaimer (10 points)	Completed mission 5 on any difficulty.
Requiem (10 points)	Completed mission 2 on any difficulty.
Roses vs Violets (20 points)	Found one of the RvB Easter Eggs in Spartan Ops.
Sharing is Caring (5 points)	Uploaded a File to your File Share.
Shutdown (10 points)	Completed mission 6 on any difficulty.
Skullduggery (15 points)	Completed any Campaign mission with 3 or more Skulls on Heroic or harder.
Snapshot! (5 points)	Saved a Screenshot from the Theater.
Terminus (50 points)	Found all of the Terminals in the Campaign.
The Cartographer (5 points)	Created and saved a Custom Map in Forge.
The Challenged (10 points)	Completed a Challenge.
The Challenger (20 points)	Completed 25 Challenges.
The Director (5 points)	Saved a Film Clip from the Theater.
The Legend of 117 (70 points)	Completed the Campaign on Legendary difficulty.
This is my Rifle, This is my Gun (20 points)	Carried a UNSC weapon all the way through mission 3 on Heroic or harder.
Wake Up, John (20 points)	Completed the Campaign on Normal or harder.
What Power Outage? (20 points)	Completed Chapter 4, Episode 5 of Spartan Ops without losing a generator on Heroic or harder.
What a Poser! (5 points)	Changed your Spartan's pose in the Spartan ID card.