Here is the full list of all 43 Diablo III: Reaper of Souls - there are Ultimate Evil Edition achievements worth 1,000 gamerscore.
Complete 500 Bounties.
Reach level 70 with 6 different classes.
Equip all Inventory slots with Legendary items that have a minimum required level of 70 or higher.
Enchant all your equipment slots.
Get a destruction callout for breaking 50 objects.
Finish a Nephalem Rift within 15 Minutes.
Reach level 70.
Reach level 70 in Hardcore mode.
Raise the Jeweler to level 12.
Kill 100 Treasure Goblins.
Raise the Blacksmith to level 12.
Kill 500 Monsters while in Nephalem Rifts.
Complete 5 Bounties.
Pick up 500,000 gold.
Kill Malthael in Hardcore mode.
Kill Diablo in Hardcore mode.
Complete all quests in Act V.
Kill Malthael.
Kill Adria.
Kill 500 elite (champion, rare, or unique) enemies.
Kill Urzael.
Replace a property with Enchanting.
Raise the Mystic to level 12.
Acquire the Mystic.
Complete all quests in Act IV.
Kill Diablo.
Complete all quests in Act III.
Kill Azmodan.
Kill the Siegebreaker Assault Beast.
Kill Ghom.
Complete all quests in Act II.
Kill Belial.
Kill Zoltun Kulle.
Craft 100 items.
Combine gems.
Kill Maghda.
Recruit the Templar, Scoundrel, and Enchantress.
Complete all quests in Act I.
Kill the Butcher.
Socket a gem in an item.
Craft 5 items.
Kill the Skeleton King.
Use a merchant to repair an item.