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