Here is the full list of all 46 Anthem achievements worth 1,000 gamerscore. It takes around 60-80 hours to unlock all of the achievements on Xbox One.
Complete a mission, contract, or stronghold with a masterwork javelin rarity.
Discover all districts, landmarks, and hidden places in Ruins of Shadowmark.
Discover all districts, landmarks, and hidden places in Fortress of Dawn.
Discover all districts, landmarks, and hidden places in High Road.
Discover all districts, landmarks, and hidden places in Valley of Tarsis.
Discover all districts, landmarks, and hidden places in Eastern Reach.
Discover all districts, landmarks, and hidden places in East Gate.
Discover all districts, landmarks, and hidden places in Great Falls Canyon.
Complete tasks to aid the Arcanist cause.
Discover all districts, landmarks, and hidden places in Emerald Abyss.
Complete 3 Assault Rifle I Challenges
Complete a mission, contract, or stronghold with an epic javelin rarity.
Complete Matthias's Riddles of Raban Maur story.
Complete 3 Marksman Rifle I Challenges
Complete a mission, contract, or stronghold with a rare javelin rarity.
Complete Yarrow's Keeping Promises story.
Discover all districts, landmarks, and hidden places in Academy Ruins.
Discover all districts, landmarks, and hidden places in Monument Watch.
Complete Dax's Emerald Abyss story.
Complete Return to the Heart of Rage.
Complete Freelancer Down.
Complete Matthias's Triple Threat story.
Complete 3 Light Machine Gun I Challenges
Complete The Fortress of Dawn.
Complete The Tomb of General Tarsis.
Complete Matthias's Search for Knowledge story.
Complete a mission, contract, or stronghold with an uncommon javelin rarity.
Complete Part 1 of Brin's Need to Know story.
Complete Finding Old Friends.
Complete Incursion.
Complete Early Warnings.
Complete all Bastion Collectibles challenges.
Complete Part 2 of Brin's Need to Know story.
Complete Yarrow's Shallow Grave story.
Complete 12 Ranger Gear I Challenges
Complete 3 Autocannon I Challenges
Complete tasks to aid the Freelancer cause.
Complete 12 Interceptor Gear I Challenges
Complete 3 Grenade Launcher I Challenges
Complete tasks to aid the Sentinel cause.
Complete 12 Colossus Gear I Challenges
Complete 3 Heavy Pistol I Challenges
Complete 3 Shotgun I Challenges
Complete 12 Storm Gear I Challenges
Complete 3 Machine Pistol I Challenges
Complete 3 Sniper Rifle I Challenges