The Twilight Destroyer (10 player)
Defeat Halion in The Ruby Sanctum in 10-player mode.
10
I've Gone and Made a Mess (25 player)
Defeat the Deathbringer before Mark of the Fallen Champion is cast five times in 25-player mode.
10
Storming the Citadel (25 player)
Defeat the first four bosses in Icecrown Citadel in 25-player mode.
10
I'm on a Boat (25 player)
Claim victory in the Gunship Battle without any raid member visiting the enemy gunship more than once in 25-player mode.
10
Storming the Citadel (10 player)
Defeat the first four bosses in Icecrown Citadel in 10-player mode.
10
I've Gone and Made a Mess (10 player)
Defeat the Deathbringer before Mark of the Fallen Champion is cast three times in 10-player mode.
10
Make Quick Werk Of Him (10 player)
Defeat Patchwerk in Naxxramas in 3 minutes or less in 10-player mode.
10
I'm on a Boat (10 player)
Claim victory in the Gunship Battle without any raid member visiting the enemy gunship more than twice in 10-player mode.
10
Boned (10 player)
Defeat Lord Marrowgar without any raid member remaining impaled for more than 8 seconds in 10-player mode.
10
Call of the Grand Crusade (10 player)
Defeat every boss in the Trial of the Grand Crusader in 10-player Heroic mode.
10
The Twilight Zone (10 player)
With all three Twilight Drakes still alive, engage and defeat Sartharion the Onyx Guardian in 10-player mode.
10
Salt and Pepper (25 player)
Defeat the Twin Val'kyr in 3 minutes or less in 25-player mode.
10
Call of the Crusade (25 player)
Defeat every boss in the Trial of the Crusader in 25-player mode.
10
Disarmed (10 player)
Destroy both of Kologarn's arms and then Kologarn himself within 12 seconds in 10-player mode.
10
Must Deconstruct Faster (10 player)
Defeat XT-002 Deconstructor in 205 seconds in 10-player mode.
10
Onyxia's Lair (25 player)
Defeat Onyxia in 25-player mode.
10
Not One, But Two Jormungars (10 player)
Defeat Acidmaw and Dreadscale within 10 seconds of each other in 10-player mode.
10
Salt and Pepper (10 player)
Defeat the Twin Val'kyr in 3 minutes or less in 10-player mode.
10
Onyxia's Lair (10 player)
Defeat Onyxia in 10-player mode.
10
More Dots! (10 player)
Defeat Onyxia in less than 5 minutes in 10-player mode.
10
Call of the Crusade (10 player)
Defeat every boss in the Trial of the Crusader in 10-player mode.
10
The Keepers of Ulduar (25 player)
Defeat the Keeper bosses of Ulduar in 25-player mode.
10
Staying Buffed All Winter (25 player)
Possess the effects of Toasty Fire, Storm Power and Starlight at the same time in 25-player mode.
10
Stokin' the Furnace (25 player)
Defeat Ignis the Furnace Master in 4 minutes in 25-player mode.
10
Orbit-uary (25 player)
Defeat Flame Leviathan with 4 Orbital Defense Systems active in 25-player mode.
10
Orbital Bombardment (25 player)
Defeat Flame Leviathan with 1 Orbital Defense System active in 25-player mode.
10
Orbital Devastation (25 player)
Defeat Flame Leviathan with 2 Orbital Defense Systems active in 25-player mode.
10
Nuked from Orbit (25 player)
Defeat Flame Leviathan with 3 Orbital Defense Systems active in 25-player mode.
10
Twilight Duo (10 player)
With at least two Twilight Drakes still alive, engage and defeat Sartharion the Onyx Guardian in 10-player mode.
10
The Secrets of Ulduar (10 player)
Defeat every boss in Ulduar in 10-player mode.
25
Drive Me Crazy (10 player)
Defeat Yogg-Saron without any raid member going insane in 10-player mode.
10
The Descent into Madness (10 player)
Defeat the bosses of The Descent into Madness area of Ulduar in 10-player mode.
10
Lose Your Illusion (10 player)
Defeat Thorim while Sif is present in 10-player mode.
10
Staying Buffed All Winter (10 player)
Possess the effects of Toasty Fire, Storm Power and Starlight at the same time in 10-player mode.
10
Stokin' the Furnace (10 player)
Defeat Ignis the Furnace Master in 4 minutes in 10-player mode.
10
Gonna Go When the Volcano Blows (10 player)
Defeat Sartharion the Onyx Guardian without getting hit by Lava Strike in 10 player mode.
10
Twilight Duo (25 player)
With at least two Twilight Drakes still alive, engage and defeat Sartharion the Onyx Guardian in 25-player mode.
10
Nerf Scrapbots (10 player)
Defeat 20 XS-013 Scrapbots within 12 seconds using XE-321 Boombots in 10-player mode.
10
Shattered (10 player)
Defeat Ignis the Furnace Master after shattering 2 Iron Constructs within 5 seconds in 10-player mode.
10
The Keepers of Ulduar (10 player)
Defeat the Keeper bosses of Ulduar in 10-player mode.
10
Con-speed-atory (10 player)
Defeat Freya within 20 minutes of the first creature you kill in the Conservatory of Life in 10-player mode.
10
Siffed (10 player)
Force Thorim to enter the arena while Sif is present in 10-player mode.
10
Getting Cold in Here (10 player)
Defeat Hodir without any raid member having more than 2 stacks of Biting Cold in 10-player mode.
10
Nerf Gravity Bombs (10 player)
Defeat XT-002 Deconstructor without any raid member dying from a Gravity Bomb in 10-player mode.
10
Nerf Engineering (10 player)
Defeat XT-002 Deconstructor without him recovering any health from XS-013 in 10-player mode.
10
Orbital Devastation (10 player)
Defeat Flame Leviathan with at least 2 Orbital Defense Systems active in 10-player mode.
10
Orbital Bombardment (10 player)
Defeat Flame Leviathan with at least 1 Orbital Defense System active in 10-player mode.
10
I'll Take You All On (10 player)
Defeat Thorim, the Ancient Rune Giant and the Runic Colossus in 10-player mode.
10
I Have the Coolest Friends (10 player)
Defeat Hodir without any friendly NPC dying in 10-player mode.
10
The Antechamber of Ulduar (10 player)
Defeat the bosses of The Antechamber area of Ulduar in 10-player mode.
10
I Choose You, Stormcaller Brundir (10 player)
Defeat the Assembly of Iron with Stormcaller Brundir as the last member alive in 10-player mode.
10
The Siege of Ulduar (10 player)
Defeat the bosses of The Siege area of Ulduar in 10-player mode.
10
Hot Pocket (10 player)
Survive being thrown into Ignis the Furnace Master's Slag Pot in 10-player mode.
10
A Quick Shave (10 player)
Defeat Razorscale without allowing her to fly into the air more than once in 10-player mode.
10
Shutout (10 player)
Defeat Flame Leviathan without causing a System Shutdown in 10-player mode.
10
Hot Pocket (25 player)
Survive being thrown into Ignis the Furnace Master's Slag Pot in 25-player mode.
10
Make Quick Werk Of Him (25 player)
Kill Patchwerk in Naxxramas in 3 minutes or less in 25-player mode.
10
Con-speed-atory (25 player)
Defeat Freya within 20 minutes of the first creature you kill in the Conservatory of Life in 25-player mode.
10
I'll Take You All On (25 player)
Defeat Thorim, the Ancient Rune Giant and the Runic Colossus in 25-player mode.
10
I Have the Coolest Friends (25 player)
Defeat Hodir without any friendly NPC dying in 25-player mode.
10
The Antechamber of Ulduar (25 player)
Defeat the bosses of The Antechamber area of Ulduar in 25-player mode.
10
I Choose You, Stormcaller Brundir (25 player)
Defeat the Assembly of Iron with Stormcaller Brundir as the last member alive in 25-player mode.
10
Must Deconstruct Faster (25 player)
Defeat XT-002 Deconstructor in 205 seconds in 25-player mode.
10
Nerf Engineering (25 player)
Defeat XT-002 Deconstructor without him recovering any health from XS-013 Scrapbots in 25-player mode.
10
The Siege of Ulduar (25 player)
Defeat the bosses of The Siege area of Ulduar in 25-player mode.
10
Nerf Gravity Bombs (25 player)
Defeat XT-002 Deconstructor without any raid member dying from a Gravity Bomb in 25-player mode.
10
A Quick Shave (25 player)
Defeat Razorscale without allowing her to fly into the air more than once in 25-player mode.
10
Shutout (25 player)
Defeat Flame Leviathan without causing a System Shutdown in 25-player mode.
10
The Safety Dance (25 player)
Defeat Heigan the Unclean in Naxxramas without anyone in the raid dying in 25-player mode.
10
Momma Said Knock You Out (25 player)
Defeat Grand Widow Faerlina in Naxxramas without dispelling or preventing frenzy in 25-player mode.
10
Sapphiron's Demise (25 player)
Defeat Sapphiron in Naxxramas in 25-player mode.
10
The Fall of Naxxramas (25 player)
Defeat every boss in Naxxramas in 25-player mode.
50
Arachnophobia (25 player)
Kill Maexxna in Naxxramas within 20 minutes of Anub'Rekhan's death in 25-player mode.
10
The Construct Quarter (25 player)
Defeat the bosses of The Construct Quarter of Naxxramas in 25-player mode.
10
The Military Quarter (25 player)
Defeat the bosses of The Military Quarter of Naxxramas in 25-player mode.
10
Arachnophobia (10 player)
Defeat Maexxna in Naxxramas within 20 minutes of Anub'Rekhan's death in 10-player mode.
10
Momma Said Knock You Out (10 player)
Defeat Grand Widow Faerlina in Naxxramas without dispelling or preventing frenzy in 10 player mode.
10
The Spellweaver's Downfall (25 player)
Defeat Malygos in 25-player mode.
25
Kel'Thuzad's Defeat (25 player)
Defeat Kel'Thuzad in Naxxramas in 25-player mode.
10
Kel'Thuzad's Defeat (10 player)
Defeat Kel'Thuzad in Naxxramas in 10-player mode.
10
The Fall of Naxxramas (10 player)
Defeat every boss in Naxxramas in 10-player mode.
25
Sapphiron's Demise (10 player)
Defeat Sapphiron in Naxxramas in 10-player mode.
10
The Arachnid Quarter (10 player)
Defeat the bosses of The Arachnid Quarter of Naxxramas in 10-player mode.
10
The Construct Quarter (10 player)
Defeat the bosses of The Construct Quarter of Naxxramas in 10-player mode.
10
The Military Quarter (10 player)
Defeat the bosses of The Military Quarter of Naxxramas in 10 player mode.
10
Besting the Black Dragonflight (25 player)
Defeat Sartharion the Onyx Guardian in 25-player mode.
25
Less Is More (25 player)
Defeat Sartharion the Onyx Guardian and the Twilight Drakes with fewer than 21 players in 25-player mode.
10
Twilight Assist (25 player)
With at least one Twilight Drake still alive, engage and defeat Sartharion the Onyx Guardian in 25-player mode.
10
The Plague Quarter (25 player)
Defeat the bosses of The Plague Quarter of Naxxramas in 25-player mode.
10
The Arachnid Quarter (25 player)
Defeat the bosses of The Arachnid Quarter of Naxxramas in 25-player mode.
10
Twilight Assist (10 player)
With at least one Twilight Drake still alive, engage and defeat Sartharion the Onyx Guardian in 10-player mode.
10
The Spellweaver's Downfall (10 player)
Defeat Malygos in 10-player mode.
10
The Plague Quarter (10 player)
Defeat the bosses of The Plague Quarter of Naxxramas in 10-player mode.
10
The Safety Dance (10 player)
Defeat Heigan the Unclean in Naxxramas without anyone in the raid dying in 10 player mode.
10
Besting the Black Dragonflight (10 player)
Defeat Sartharion the Onyx Guardian in 10-player mode.
10