Bungie has posted a very special weekly update, chronicling not only the full achievement list of Halo Reach, but announcing that their studio is moving to a new location in Bellevue from their longtime home in Kirkland, Washington.
The achievement list is 49 strong, with a nice balance of single player, campaign, co-op, and multiplayer achievements to earn. There's even achievements for the recently announced Forge World, helping to promote players to explore and promote content.
Warning, to some the achievements might be a bit spoilerish - so only proceed if you are sure you want the goods.
- Completed the Campaign on Normal difficulty.
- Completed the Campaign on Heroic difficulty.
- Completed the Campaign on Legendary difficulty.
- Completed every mission in Halo: Reach alone, on Legendary.
- Completed the 2nd mission on Normal or harder.
- Completed the 3rd mission on Normal or harder.
- Completed the 4th mission on Normal or harder.
- Completed the 5th mission on Normal or harder.
- Completed the 6th mission on Normal or harder.
- Completed the 7th mission on Normal or harder.
- Completed the 8th mission on Normal or harder.
- Completed the 9th mission on Normal or harder.
- Completed the 10th mission on Normal or harder.
- Cleared the 2nd mission without setting foot in a drivable vehicle.
- Killed 2 vehicles at once with the Target Locator in the 3rd mission.
- Hijacked a Banshee during the Reach Campaign.
- Killed the Elite Zealot before he escaped during the 5th mission.
- Performed an Assassination against an Elite to survive a fall that would've been fatal.
- Destroyed the Corvette's engines & escort in under 3 minutes in the 6th mission on Heroic or harder.
- Finished the 9th mission on Legendary with the Scorpion intact.
- Earned a Triple Kill while Jetpacking in Campaign, Firefight or Matchmaking.
- Killed 7 Moa during the 2nd mission of the Campaign.
- Killed 3 of the anti-aircraft batteries during the 8th mission.
- Used a Health Pack to replenish life after taking body damage.
- Performed an Assassination on an enemy.
- Killed 10 enemies in a Firefight or Campaign session with the M6G pistol.
- Killed 10 enemies in a Firefight or Campaign session with the DMR.
- Traded weapons with an AI ally in Campaign.
- Killed 10 enemies in Firefight or Campaign with a supercombine explosion.
- Let a teammate spawn on you 5 times in an Invasion Matchmaking game.
- Earned a First Strike Medal in a Matchmaking game.
- Won a game of Invasion in the 1st phase.
- Earned a Killing Spree in multiplayer Matchmaking.
- Earned a Killionaire medal in Firefight.
- As an Elite, killed 5 Spartan players in Matchmaking.
- Scored 15,000 points in Score Attack Firefight Matchmaking.
- Scored 50,000 points in a Firefight game.
- Scored 200,000 points in a Firefight game.
- Scored 1,000,000 points in a Firefight game.
- Completed a Firefight set on Legendary without dying.
- Purchased an item from the Armory that required the rank of Lt. Colonel.
- Reached the rank of Corporal in the UNSC.
- Reached the rank of Captain in the UNSC.
- Used the File Browser to upload a file to your File Share.
- Completed all of the Daily Challenges in a given day.
- Purchased an item from the Armory.
- Recommended a file to someone.
- Advanced a Commendation to a Silver state.
- Completed a Weekly Challenge.
Source: Bungie.net