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