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