Full list of all 72 Fallout 76 achievements worth 1,580 gamerscore. It takes around 80-100 hours to unlock all of the achievements in the base game on Xbox One.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 5 DLC packs containing 22 achievements worth 580 Gamerscore.
Reach Level 100
Possess 10,000 Caps
Complete "I Am Become Death"
Complete "Officer on Deck"
Mod 50 Weapons
Reach Level 50
Complete "One of Us"
Complete "Bunker Buster"
Complete the "Monster Mash" Event
Build 100 C.A.M.P. Items
Complete "Heart of the Enemy"
Complete "Recruitment Blues"
Complete "Coming to Fruition"
Be at Ground Zero of a Nuclear Blast
Complete "Queen of the Hunt"
Complete "Key to the Past"
Complete "Mistress of Mystery"
Hack 50 Terminals
Collect 10 Bobbleheads
Read 20 Magazines
Win the "Scorched Earth" Event
Complete "Personal Matters"
Kill 5 Giant Creatures
Win the "Breach and Clear" Event
Reach Level 25
Complete "Into the Fire"
Discover 100 Locations
Pick 50 Locks
Fully Rank Up one Perk
Kill 300 Creatures
Revive 20 Fallen Players
Kill 20 Players
Kill a Wanted Player
Kill Another Player
Join 20 Teams
Reach Level 10
Complete 20 Challenges
Complete "Final Departure"
Build 20 C.A.M.P. Items
Complete "Second Helpings"
Collect a Bobblehead
Take 20 Photos
Build a C.A.M.P.
Complete "First Contact"
Gather 200 Pieces of Junk
Complete 5 Challenges
Craft a Weapon
Craft 5 Pieces of Armor
Play a Holotape Game
Leave Vault 76
Become allies with Foundation
Become allies with Crater
Complete "Buried Treasure"
Gain 1500 gold bullion
Gain 300 gold bullion
Complete "All That Glitters"
Complete Sofia's story
Complete Beckett's story
Complete "The Elusive Crane"
Find the Overseer
Complete “The Catalyst”
Craft a 1 star legendary mod, a 2 star legendary mod, and a 3 star legendary mod
Earn Elder Rewards from a Daily Op
Complete 10 Favors for people in The Whitespring Refuge
Kill 100 Trogs with an Auto Axe
Lead and complete "Union Dues" and "From Ashes to Fire"
Build 5 casino games in your CAMP.
Lead and complete “Tax Evasion” and “The Most Sensational Game”
Kill 10 Lesser Devils with a melee weapon.
Complete "Sins of the Father"
Lead and Complete "The Human Condition"
Kill 100 Overgrown with fire