The Rise of the Necromancer Add-on for Diablo III: Reaper of Souls - Ultimate Evil Edition has 10 achievements worth 215 gamerscore.
Use Bone Armor to rip the Bones from the Skeleton King.
Listen to all of Master Ordan's conversations in the Pandemonium Fortress.
Reach level 70 with a Necromancer.
Complete Act V with a Necromancer.
Damage 40 enemies with Bone Spear in 3 seconds.
Kill 1,000 Undead enemies with corpses.
Kill 5,000 cursed enemies.
While under 10% life and fighting Diablo, use an ability that costs health and then defeat him.
Kill 500 elite (champion, rare, or unique) enemies with Command Skeletons minions.
Kill your own Shadow Clone with Simulacrum during the Diablo encounter.