Full list of all 45 Diablo III achievements worth 1,000 gamerscore. It takes around 60-80 hours to unlock all of the achievements on Xbox 360.
Kill Diablo in Inferno mode.
Kill Azmodan in Inferno mode.
Kill Belial in Inferno mode.
Complete all the Belial triumph challenges.
Kill Maghda in Inferno mode.
Kill the Butcher in Inferno mode.
Complete all the Butcher triumph challenges.
Kill the Skeleton King in Inferno mode.
Kill Diablo in Hell mode.
Complete all the Azmodan triumph challenges.
Buy all stash upgrades.
Reach level 60.
Pick up 500,000 gold.
Equip all Inventory slots with items that have a minimum required level of 25 or higher.
Raise the Jeweler to level 10.
Raise the Blacksmith to level 10.
Kill Diablo in Nightmare mode.
Kill 500 elite (champion, rare, or unique) enemies.
Complete all quests in Act IV.
Kill Diablo in Normal mode.
Complete all quests in Act III.
Kill Azmodan in Normal mode.
Reach level 30.
Complete all quests in Act II.
Kill Belial in Normal mode.
Combine gems.
Kill Maghda in Normal mode.
Recruit the Templar, Scoundrel, and Enchantress.
Complete all quests in Act I.
Kill the Butcher in Normal mode.
Equip a legendary (orange) item.
Kill one of the unique enemies listed in the Never Seen That Before Challenge.
Craft 5 items.
Equip a rare (yellow) item.
Kill the Skeleton King in Normal mode.
Use a merchant to repair an item.
Reach level 10.
Reach level 30 in Hardcore mode.
Complete all the Diablo triumph challenges.
Equip all Inventory slots with items that have a minimum required level of 60 or higher.
Fully equip one of your followers.
Complete all the main character, follower, and artisan conversation challenges.
Buy each type of item from merchants.
Pick up 5,000,000 gold.
Kill 100 Treasure Goblins.