Just Can't Get Enough (10 player)
Defeat Kel'Thuzad in Naxxramas while killing at least 18 abominations in his chamber 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
You Don't Have An Eternity (10 player)
Defeat Malygos in 6 minutes or less in 10-player mode.
10
Denyin' the Scion (10 player)
Deliver a killing blow to a Scion of Eternity while riding on a hover disk in 10-player mode.
10
Denyin' the Scion (25 player)
Deliver a killing blow to a Scion of Eternity while riding on a hover disk in 25-player mode.
10
Gonna Go When the Volcano Blows (25 player)
Defeat Sartharion the Onyx Guardian without getting hit by Lava Strike in 25-player mode.
10
Just Can't Get Enough (25 player)
Defeat Kel'Thuzad in Naxxramas while killing at least 18 abominations in his chamber in 25-player mode.
10
The Hundred Club (25 player)
Defeat Sapphiron in Naxxramas without any member of the raid having a frost resist value over 100 in 25-player mode.
10
And They Would All Go Down Together (25 player)
Defeat the 4 Horsemen in Naxxramas, ensuring that they all die within 15 seconds of each other in 25-player mode.
10
Shocking! (25 player)
Defeat Thaddius in Naxxramas without anyone in the raid crossing the negative and positive charges in 25 player mode.
10
The Military Quarter (25 player)
Defeat the bosses of The Military Quarter of Naxxramas in 25-player mode.
10
The Hundred Club (10 player)
Defeat Sapphiron in Naxxramas without any member of the raid having a frost resist value over 100 in 10-player mode.
10
The Spellweaver's Downfall (25 player)
Defeat Malygos in 25-player mode.
25
You Don't Have An Eternity (25 player)
Defeat Malygos in 6 minutes or less 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
Besting the Black Dragonflight (25 player)
Defeat Sartharion the Onyx Guardian in 25-player mode.
25
The Twilight Zone (25 player)
With all three Twilight Drakes still alive, engage and defeat Sartharion the Onyx Guardian in 25-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
Kel'Thuzad's Defeat (25 player)
Defeat Kel'Thuzad in Naxxramas in 25-player mode.
10
The Fall of Naxxramas (25 player)
Defeat every boss in Naxxramas in 25-player mode.
50
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 Safety Dance (25 player)
Defeat Heigan the Unclean in Naxxramas without anyone in the raid dying 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
The Arachnid Quarter (25 player)
Defeat the bosses of The Arachnid Quarter of Naxxramas 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
Make Quick Werk Of Him (25 player)
Kill Patchwerk in Naxxramas in 3 minutes or less 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
Twilight Duo (10 player)
With at least two Twilight Drakes still alive, engage and defeat Sartharion the Onyx Guardian 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 (10 player)
Defeat Malygos in 10-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 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
The Military Quarter (10 player)
Defeat the bosses of The Military 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
Make Quick Werk Of Him (10 player)
Defeat Patchwerk in Naxxramas in 3 minutes or less in 10-player mode.
10
The Arachnid Quarter (10 player)
Defeat the bosses of The Arachnid Quarter of Naxxramas in 10-player mode.
10
Arachnophobia (10 player)
Defeat Maexxna in Naxxramas within 20 minutes of Anub'Rekhan's death in 10-player mode.
10