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