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