Full list of all 35 Fallout Shelter achievements worth 1,000 gamerscore. It takes around 80-100 hours to unlock all of the achievements on Xbox One.
Collected 20 Legendary Outfits
Completed 100 objectives
Built 1 of every room type
Completed 100 Quests
Crafted every Theme
Collected 20 Legendary Weapons
Completed 60 Quests
Made 25 dialogue choices on Quests
Collected all Fragments of 4 Theme Recipes
Crafted an Outfit, a Weapon and a Theme
Completed 30 Quests
Collected 100 Stimpaks and 100 RadAway on Quests
Scrapped 500 items
Collected all Fragments of a Theme Recipe
Successfully stopped 50 Raider Attacks
Killed 500 enemies on Quests
Upgraded 20 Rooms to Level 3
Leveled up a Dweller from level 1 to 50
Changed the appearance of 10 Dwellers in the Barbershop
Killed 10 Quest Bosses
Completed 10 Quests
Crafted 10 Outfits
Successfully completed 50 Room Rushes
Made 25 Babies
Built 50 rooms
Crafted 10 Weapons
Leveled up a dweller from Level 1 to 25
Built 25 rooms
Collected 10,000 Caps
Merged 3 Water Rooms
Leveled up a dweller from Level 1 to 10
Merged 3 Food Rooms
Merged 3 Power Rooms
Collected 1,000 Caps
Collect 20 Legendary Dwellers