Fall of the Lich King (25 player) is a dungeon & raids achievement earned for defeating every boss in Icecrown Citadel on 25-player mode.
See also
Patch changes
- Patch 3.3.0 (2009-12-08): Added.
Fall of the Lich King (25 player) is a dungeon & raids achievement earned for defeating every boss in Icecrown Citadel on 25-player mode.