Halo 3: Complete the Halo 3 LASO Campaign playlist.

Halo 2: Complete the LASO campaign playlist.

Halo 3: Complete all Halo 3 Legendary campaign missions in under 3 hours.

Halo 3: Complete three Halo 3 playlists.

Halo 2: Beat the par score on every Halo 2 level.

Halo CE: Complete every level of the game on Heroic difficulty.

Halo 3: Beat the par score on every Halo 3 level.

Halo 2: Complete three Halo 2 playlists.

Halo CE: Activate all Halo: CE Terminals.

Halo 4: Complete three Halo 4 playlists.

Halo CE: Beat par time on all Halo: CE levels.

Halo 4: Beat the par time on all Halo 4 levels.

Halo CE: Complete three Halo: CE playlists.

Halo 3: Find and claim all Skulls in Halo 3.

Halo 3: Complete every level of the game on Heroic difficulty.

Halo 4: Beat the par score on every Halo 4 level.

Halo CE: Complete 343 Guilty Spark.

Collect 3,000 campaign or playlist medals.

Collect 5,000 campaign or playlist medals.

Halo CE: Complete a Halo: CE playlist.

Collect 4,000 campaign or playlist medals.

Collect 2,000 campaign or playlist medals.

Earn a total of 2,500 Headshot medals in multiplayer.

Halo CE: Launch a Warthog for at least 5 seconds and have it splatter an enemy.

Halo CE: Kill the first group of enemies on The Truth and Reconciliation without being detected.

Collect 1,000 campaign or playlist medals.

Halo CE: Beat the par time on The Maw.

Halo 3: Complete Halo on 4-player Legendary co-op, with Iron Skull, and everyone in Ghosts.

Halo 2: Beat the par time on The Great Journey.

Halo 3: Beat the par score on The Storm.

Halo 3: Complete The Storm.

Halo CE: Complete Assault on the Control Room.

Win 250 multiplayer games.

Halo CE: Storm The Silent Cartographer beach with no Marine casualties on Heroic or Legendary.

Halo CE: Complete every level of the game having seen it in both classic and remastered mode.

Halo 3: On Tsavo Highway, complete the level without entering a vehicle.

Halo 2: Stick a Plasma Grenade to a Stealth Elite on Outskirts.

Halo 2: Complete every level of the game on Easy difficulty.

Complete 400 missions or multiplayer games.

Halo CE: Complete every level of the game on Normal difficulty.

Kill a 343 developer in matchmaking or someone who has this achievement.

Halo 2A MP: Destroyed all the Halo 2 Anniversary Multiplayer BLAST soda cans.

Halo 2A MP: Blow up the Banshee or Hornet in flight while piloted, with the Rocket Launcher.

Halo 2: Beat the par score on Cairo Station.

Halo 2A MP: In Assault, take, plant, and score from the bomb spawn without dying or dropping it.

Complete 200 missions or multiplayer games.

Halo 3: Complete a Halo 3 playlist.

Halo 2: Beat the par score on Delta Halo.

Halo 3: Find all the hidden multiplayer Skulls.

Complete any co-op level on Legendary difficulty.

Halo 4: Complete Infinity without one preventable Marine death on Heroic or Legendary.

Complete any co-op level on Heroic difficulty.

Halo 2: Complete Cairo Station.

Complete 300 missions or multiplayer games.

Complete 150 missions or multiplayer games.

Earn a total of 500 Grenade Kill or Plasma Kill medals in matchmade games.

Halo 3: Beat the par score on Tsavo Highway.

Halo CE: Beat the par score on The Silent Cartographer.

Halo CE: Complete a match on at least 4 unique game types.

Halo 4: Complete a Halo 4 playlist.

Collect 7,000 campaign or playlist medals.

Halo 4: Kill 3 Crawlers in one hit with the Gravity Hammer on Midnight.

Halo CE: Beat the par score on 343 Guilty Spark.

Halo 3: Complete Floodgate.

Halo CE: Complete The Truth and Reconciliation with at least four rounds left in your Sniper Rifle.

Halo 2A MP: On Lockdown, kill an opponent with the hanging ice.

Complete 350 missions or multiplayer games.

Halo 2: Complete Metropolis without entering a vehicle on Heroic or Legendary.

Halo 4: Complete Composer.

Halo CE: Beat the par score on The Maw.

Win 50 multiplayer games.

Halo 4: Beat the par time on Midnight.

Halo 2A MP: With a Sniper Rifle or Beam Rifle kill an enemy that was zoomed in.

Halo 3: Beat the par time on Floodgate.

Kill 1000 Brutes.

Halo 4: Beat the par score on Requiem.

Halo 4: Complete Dawn.

Halo 2A MP: Get awarded at least 10 different medals in one multiplayer game.

Halo 2: Complete Delta Halo.

Halo 2: Complete any campaign level without dying on Normal or harder.

Halo 2: View one of the seasonal signs on Zanzibar in classic multiplayer.

Halo CE: Beat the par time on The Pillar of Autumn.

Earn a total of 250 Beat Down medals in multiplayer.

Kill 1000 Crawlers.

Earn a total of 100 Legendary medals in matchmade games.

Halo 2: Beat the par time on Cairo Station.

Halo 2A MP: In Anniversary multiplayer, receive 2 or more Double Kill medals.

Earn a total of 250 Double Kill medals in matchmade games.

Halo 3: View 2 different sigils on Valhalla.

Halo 4: Beat the par score on Shutdown.

Halo 2A MP: In Territories, control any 3 Territories simultaneously for 30 seconds.

Halo 4: Trick or force a Hunter to fall to its demise on Shutdown on Heroic or Legendary.

Halo 3: Beat the par score on Floodgate.

Halo 2: Beat the par time on High Charity.

Halo CE: Complete a level without jumping.

Halo 3: Beat the par time on The Ark.

Kill 1000 Elites.

Halo CE: Beat the par time on Two Betrayals.

Halo 3: On The Ark, complete the level without entering a vehicle on Legendary.

Halo 2: Complete a match on at least 4 different game types in classic multiplayer.

Halo 4: Beat the par score on Midnight.

Halo 3: Complete a match on at least 8 different multiplayer maps.

Halo CE: Beat the par time on Assault on the Control Room.

Halo CE: Destroy four Wraith tanks in Assault on the Control Room with the Scorpion tank.

Kill 250 Hunters.

Halo 2: Beat the par time on The Arbiter.

Halo CE: Beat the par time on The Truth and Reconciliation.

Halo 2: In The Oracle, find the holo-drone before the Heretic Leader activates it.

Halo CE: Play Halo: CE on the 15th of any month.

Halo 4: Play a game of Halo 4 on the 6th of any month.

Halo 2: Collect the Master Chief toy in Delta Halo.

Halo 2: Spot the hippo on the walls of Headlong in classic multiplayer.

Halo CE: Activate Terminal 1 on The Pillar of Autumn.

Halo 3: Find the hidden Skull on the Assembly multiplayer map.

Halo 3: Activate Terminal 6 on The Covenant.

Halo 2: Play a game of Halo 2 Anniversary on the 9th of any month.

Halo CE: Play a CTF custom game on Blood Gulch with 4 players on the same console. Tri-tip optional.

Kill 100 Grunts.

Halo CE: Activate Terminal 6 on 343 Guilty Spark.

Halo 3: Activate Terminal 3 on The Ark.

Halo 2A MP: Found and destroyed the BLAST soda can on Bloodline.

Halo 3: Fight alongside and listen to The Man. The Legend. Chips Dubbo.

Halo 4: Activate Terminal 3 on Infinity.

Kill 100 Watchers.

Halo 2: Collect the Tartarus toy in Quarantine Zone.

Halo 3: Find the hidden Skull on the Citadel multiplayer map.

Halo 2A MP: Kill an opponent by detonating a Fusion Coil.

Halo 3: Listen to the story of the Final Grunt.

Halo 2: Listen to the Cowardly Grunt's woes.

Halo 4: Activate Terminal 7 on Midnight.

Halo 2: Activate Terminal 1 on Cairo Station.

Kill 100 Flood.

Halo 2: Activate Terminal 9 on Quarantine Zone.

Halo 2: Activate Terminal 8 on Sacred Icon.

Halo 4: Access the Master Chief's records on Dawn.

Halo 3: Trigger the hidden music cue in Halo 3.

Halo 2: Fly the Heretic Banshee.

Halo 2: Collect the Cortana toy in Gravemind.

Halo 2: View both signs in the level Metropolis.

Halo 2: Activate Terminal 7 on Regret.

Halo 2: Activate Terminal 6 on Delta Halo.

Halo 2: Activate Terminal 3 on Metropolis.

Halo 2: Activate Terminal 5 on The Oracle.

Halo 2A MP: On Shrine in CTF, activate the enemy base waterfall and, before it stops, grab the flag.

Complete 10 missions or multiplayer games.

Halo 3: View the communique from Mendicant Bias.

Halo 2: View this hidden message on the classic Beaver Creek map.

Halo 2: View the smiling face in the classic multiplayer map Coagulation.

Halo 2A MP: Found and destroyed the BLAST soda can on Shrine.

Halo CE: Kill a Hunter with one pistol round.