Neck-Deep in Vile (25 player)
Kill every Vile Spirit that spawns before it explodes and then defeat the Lich King in 25-player mode.
10
The Frozen Throne (10 player)
Defeat the Lich King in Icecrown Citadel in 10-player mode.
10
Fall of the Lich King (10 player)
Defeat every boss in Icecrown Citadel in 10-player mode.
25
Neck-Deep in Vile (10 player)
Kill every Vile Spirit that spawns before it explodes and then defeat the Lich King in 10-player mode.
10
The Frostwing Halls (10 player)
Defeat the bosses of The Frostwing Halls in Icecrown Citadel in 10-player mode.
10
Heroic: The Frostwing Halls (10 player)
Defeat the bosses of The Frostwing Halls in Icecrown Citadel in 10-player Heroic mode.
10
Heroic: The Crimson Hall (10 player)
Defeat the bosses of The Crimson Hall in Icecrown Citadel in 10-player Heroic mode.
10
Heroic: The Plagueworks (10 player)
Defeat the bosses of The Plagueworks in Icecrown Citadel in 10-player Heroic mode.
10
Dances with Oozes (10 player)
Defeat Rotface without a Big Ooze casting Unstable Ooze Explosion in 10-player mode.
10
Flu Shot Shortage (10 player)
Defeat Festergut while none of the players in your raid group ever had 3 stacks of Inoculated in 10-player mode.
10
Dances with Oozes (25 player)
Defeat Rotface without a Big Ooze casting Unstable Ooze Explosion in 25-player mode.
10
Heroic: The Frostwing Halls (25 player)
Defeat the bosses of The Frostwing Halls in Icecrown Citadel in 25-player Heroic mode.
10
Heroic: The Plagueworks (25 player)
Defeat the bosses of The Plagueworks in Icecrown Citadel in 25-player Heroic mode.
10
Fall of the Lich King (25 player)
Defeat every boss in Icecrown Citadel in 25-player mode.
25
The Frozen Throne (25 player)
Defeat the Lich King in Icecrown Citadel in 25-player mode.
10
Heroic: The Crimson Hall (25 player)
Defeat the bosses of The Crimson Hall in Icecrown Citadel in 25-player Heroic mode.
10
Heroic: Storming the Citadel (25 player)
Defeat the first four bosses in Icecrown Citadel in 25-player Heroic mode.
10
The Twilight Destroyer (25 player)
Defeat Halion in The Ruby Sanctum in 25-player mode.
10
Once Bitten, Twice Shy (25 player)
Defeat Blood-Queen Lana'thel once as a vampire and again without becoming a vampire in 25-player mode.
10
The Frostwing Halls (25 player)
Defeat the bosses of The Frostwing Halls in Icecrown Citadel in 25-player mode.
10
Heroic: Storming the Citadel (10 player)
Defeat the first four bosses in Icecrown Citadel in 10-player Heroic mode.
10
The Crimson Hall (25 player)
Defeat the bosses of The Crimson Hall in Icecrown Citadel in 25-player mode.
10
The Orb Whisperer (25 player)
Defeat the Blood Council without anyone in the raid taking more than 25,000 spell damage in a single hit in 25-player mode.
10
Make Quick Werk Of Him (10 player)
Defeat Patchwerk in Naxxramas in 3 minutes or less in 10-player mode.
10
The Crimson Hall (10 player)
Defeat the bosses of The Crimson Hall in Icecrown Citadel in 10-player mode.
10
The Orb Whisperer (10 player)
Defeat the Blood Council without anyone in the raid taking more than 23,000 spell damage in a single hit in 10-player mode.
10
Boned (25 player)
Defeat Lord Marrowgar without any raid member remaining impaled for more than 8 seconds in 25-player mode.
10
The Plagueworks (25 player)
Defeat the bosses of The Plagueworks in Icecrown Citadel in 25-player mode.
10
Storming the Citadel (25 player)
Defeat the first four bosses in Icecrown Citadel in 25-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
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
The Plagueworks (10 player)
Defeat the bosses of The Plagueworks 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
Storming the Citadel (10 player)
Defeat the first four bosses in Icecrown Citadel 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
Gonna Go When the Volcano Blows (10 player)
Defeat Sartharion the Onyx Guardian without getting hit by Lava Strike in 10 player mode.
10
Besting the Black Dragonflight (10 player)
Defeat Sartharion the Onyx Guardian 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
Sapphiron's Demise (25 player)
Defeat Sapphiron in Naxxramas 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
Arachnophobia (25 player)
Kill Maexxna in Naxxramas within 20 minutes of Anub'Rekhan's death 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
The Construct Quarter (25 player)
Defeat the bosses of The Construct Quarter of Naxxramas in 25-player mode.
10