Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock	Type
A history of decimation	Complete A New Enemy	10
A little bit extra	Complete half of the Campaign bonus objectives	10
A lot extra	Complete all the Campaign bonus objectives	20
A strong showing for the week	Complete a set of 3 Weekly Challenges in one week	10
Alas, poor Yorick!	Collect a Skull	10
All or nothing	Play all cards in your deck at least once in a single Blitz match	10
All travel is suspended	Complete Lights Out	10
And the knockout punch	Complete Under the Dark	10
Ante-up	Complete the Blitz tutorial	10
Behind enemy lines	Complete From the Deep	10
Big Spender	Spend 100 Leader Points in Multiplayer or Skirmish	30
Card shark	Complete 25 Blitz matches (Matchmaking only)	20
Collecting a dream	Collect all the Skulls	30
Comrades in arms	Earn a gold medal on any mission (except Prologue) in Co-op on Legendary	20
Dominated	Complete Ascension	10
Duellist	Win your first Blitz match (Matchmaking only)	10
Fifth floor: Tools, Guns, Super Weapons	Complete The Foundry	10
Firefighter	Beat wave 10 in Blitz Firefight	10
First steps	Complete a Multiplayer match (Matchmaking only)	10
Flyswatter	Destroy 100 air units with anti-air units (Multiplayer, Skirmish or Blitz)	20
Full house	Complete Blitz matches as each of the 6 launch leaders (Matchmaking only)	10
Gold rush	Earn a gold medal on any mission (except Prologue) on any difficulty	20
Guerilla tactics	Complete One Three Zero	10
It just keeps going	Beat wave 25 in Blitz Firefight	30
Jackpot	Play 777 total Blitz cards over any number of matches	40
Know the ropes	Complete the Advanced standalone tutorial	10
Last stop, this town	Complete Last Stand	10
Learn the ropes	Complete the Basic standalone tutorial	10
Lone Wolf	Complete any mission (except The Signal) solo on Legendary with all skulls activated	40
Long-term commitment	Complete at least 1 Weekly Challenge each week for a month	30
Making the most of the day	Complete 3 Daily Challenges in one day	10
Meat grinder	Kill 100 infantry with anti-infantry units (Multiplayer, Skirmish or Blitz)	20
Morbid curiosities	Collect half of the Skulls	20
Natural intelligence	Play a Skirmish match alone against only AI opponents (1 or more)	10
On fire	Score 500,000 points in a single Blitz Firefight	20
Overkill	Destroy 500 units with Leader Powers (Multiplayer, Skirmish or Blitz)	30
Paint it red	Achieve the highest possible kill-streak in any Blitz mode	10
Palmer's Pure Gold	Earn a gold medal on every mission (except Prologue) on any difficulty	30
Sentinel size matters	Complete The Halo	10
Short-term commitment	Complete at least 1 Daily Challenge each day for a week	20
Space Healer	Cast 100 Healing Leader Powers (Multiplayer, Skirmish or Blitz)	30
Spare change	Spend 5 Leader Points in Multiplayer or Skirmish	10
Stacked the chips	Gather 150 Energy Crates over any number of Blitz matches	10
Stirring the pot	Complete The Cartographer	10
Surviving the long war	Complete the Campaign on Legendary	60
The hand that feeds	Kill a unit owned by a developer or someone who has this achievement	20
The hard fight	Complete the Campaign on Heroic	40
The rank and file	Recruit or construct 1 of each UNSC unit in Multiplayer or Skirmish (Launch units only)	10
The Scrappy Six	Complete a Multiplayer match as each of the 6 launch leaders (Matchmaking only)	20
The setup...	Complete Hold the Line	10
The tribe	Recruit or construct 1 of each Banished unit in Multiplayer or Skirmish (Launch units only)	10
This war is over	Complete the Campaign	30
Trash compactor	Destroy 100 vehicles with anti-vehicle units (Multiplayer, Skirmish or Blitz)	20
Two heads are better than none	Win a Skirmish match with a friend against only AI opponents (2 or more)	10
Two heads are better than one	Complete a mission in co-op	10
Wake up	Complete The Signal	10
You've got a case of the Birley	In a 1v1 Skirmish against Legendary AI, recycle your base in the first 5 minutes and then win	20