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