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