There are 69 achievements worth a total of 1660 points
Complete the 10th mission on Normal or harder.
Complete the Campaign on Normal difficulty.
Complete the 9th mission on Normal or harder.
Complete the 8th mission on Normal or harder.
Kill 3 of the anti-aircraft batteries during the 8th mission.
Complete the 7th mission on Normal or harder.
Complete the 6th mission on Normal or harder.
Complete the 5th mission on Normal or harder.
Hijack a Banshee during the Reach Campaign.
Kill the Elite Zealot before he can escape during the 5th mission.
Complete the 4th mission on Normal or harder.
Reach the rank of Corporal in the UNSC.
Complete the 3rd mission on Normal or harder.
Complete the 2nd mission on Normal or harder.
Clear the 2nd mission without setting foot in a drivable vehicle.
Trade weapons with an AI ally in Campaign.
Kill 10 Enemies in a Firefight or Campaign session with the M6G pistol.
Earn a Triple Kill while Jetpacking in Campaign, Firefight or Matchmaking.
Use a Health Pack to recover life after taking body damage.
Perform an Assassination on an enemy.
Kill 10 enemies in a Firefight or Campaign session with the DMR.
Earn a Killionaire medal in Firefight.
Purchase any item from the Armory.
Complete each Campaign Mission on Legendary - alone.
Complete the Campaign on Legendary difficulty.
Kill 7 Moa during the 2nd mission of the Campaign.
Kill 2 vehicles at once with the Target Locator during the 3rd mission.
Kill 10 enemies in Firefight or Campaign with a supercombine explosion.
Destroy the Corvette's engines & escort in under 3 minutes in the 6th mission on Heroic or harder.
Finish the 9th mission on Legendary with the Scorpion intact.
Perform an Assassination against an Elite to survive a fall that would've been fatal.
Complete the Campaign on Heroic difficulty.
Earn a Killing Spree in multiplayer Matchmaking.
Let a teammate spawn on you 5 times in an Invasion Matchmaking game.
Win a game of Invasion in the 1st phase.
Earn a First Strike Medal in a Matchmaking game.
As an Elite, kill 5 Spartan players in Matchmaking.
Score 15,000 points in Score Attack Firefight Matchmaking.
Complete a Firefight set on Legendary without dying.
Score 50,000 points in Firefight on any map.
Score 200,000 points in Firefight on any map.
Score 1,000,000 points in Firefight on any map.
Using the File Browser upload a file to your File Share.
Complete a Weekly Challenge.
Recommend a file to someone.
Complete all of the Daily Challenges in a given day.
Reach the rank of Captain in the UNSC.
Advance any Commendation to its Silver state.
Purchase an item from the Armory that requires the rank of Lt. Colonel.
Noble 1: Earn a Double Kill with the shotgun in multiplayer Matchmaking. (DLC: Noble Map Pack - Cost: 800 MSP)
Noble 1: Kill a player at long range with the DMR in a matchmade Slayer game. (DLC: Noble Map Pack - Cost: 800 MSP)
Noble 1: Earn a kill in a matchmade Rocket Race game. (DLC: Noble Map Pack - Cost: 800 MSP)
Noble 1: Destroy a vehicle using Armor Lock in a matchmade game. (DLC: Noble Map Pack - Cost: 800 MSP)
Noble 1: Earn a Double Kill from the Grave in multiplayer Matchmaking. (DLC: Noble Map Pack - Cost: 800 MSP)
Noble 1: Collect all of the flags in a matchmade Stockpile game. (DLC: Noble Map Pack - Cost: 800 MSP)
Noble 1: Blow up the research facility in a matchmade Invasion game on Breakpoint. (DLC: Noble Map Pack - Cost: 800 MSP)
Defiant: Successfully return two flags in a matchmade CTF game. (DLC: Defiant Map Pack - Cost: 800 MSP)
Defiant: Kill 3 players with the Oddball in a matchmade Oddball game. (DLC: Defiant Map Pack - Cost: 800 MSP)
Defiant: Capture two flags from an enemy capture zone in a matchmade Stockpile game. (DLC: Defiant Map Pack - Cost: 800 MSP)
Defiant: Prevented the attacking team from touching the flag in a matchmade 1-Flag CTF game. (DLC: Anniversary Map Pack | Cost: 1200 MSP)
Defiant: Assassinated a player that just exited Armor-Lock in a matchmade game. (DLC: Anniversary Map Pack | Cost: 1200 MSP)
Defiant: Was the last surviving uninfected player in a matchmade Infection game. (DLC: Anniversary Map Pack | Cost: 1200 MSP)
Anniversary: Infected 3 players in a single round in a matchmade Infection game. (DLC: Anniversary Map Pack | Cost: 1200 MSP)
Anniversary: Killed the flag carrier with a Plasma Grenade in a matchmade game. (DLC: Anniversary Map Pack | Cost: 1200 MSP)
Anniversary: Performed a Beat Down on an enemy while using the Jetpack during a matchmade game. (DLC: Anniversary Map Pack | Cost: 1200 MSP)
Anniversary: Ran over 5 people with a vehicle in a matchmade game. (DLC: Anniversary Map Pack | Cost: 1200 MSP)
Anniversary: Captured 10 skulls at once in a matchmade Headhunter game. (DLC: Anniversary Map Pack | Cost: 1200 MSP)
Anniversary: Killed an enemy with their own grenade that was stuck to you in a matchmade game. (DLC: Anniversary Map Pack | Cost: 1200 MSP)