Alone in the Darkness (10 player)

Alone in the Darkness (10 player) was a dungeon & raids achievement earned for defeating Yogg-Saron on 10-player mode without the help of any Watchers.

Achievement series

 * 1) Three Lights in the Darkness (10 player)
 * 2) Two Lights in the Darkness (10 player)
 * 3) One Light in the Darkness (10 player)
 * 4) Alone in the Darkness (10 player)