Full list of all 50 Remnant: From the Ashes achievements. It takes around 35-40 hours to unlock all of the achievements in the base game on Windows.
The base game contains 40 achievements, and there are 2 DLC packs containing 10 achievements.
Defeat the Ent
Meet the Labyrinth Keeper
Acquire 10 traits
Defeat Singe
Upgrade Dragon Heart
Defeat 100 special enemies
Upgrade any trait to 10
Meet the Root Mother
Activate the Ward 13 World Stone
Upgrade first weapon
Acquire first trait
Defeat the Totem Father
Defeat the Ravager
Defeat the Undying King
Defeat the Claviger
Defeat Ixillis XV
Defeat the Dreamer
Defeat a world boss in single player without taking damage
Acquire 20 traits
Acquire 30 traits
Acquire 5 armor sets
Acquire 10 armor sets
Upgrade any weapon to +10
Upgrade any weapon to +20
Return the Swamp Guardian's heart to the Undying King
Acquire 5 weapon mods
Acquire 15 weapon mods
Upgrade any trait to 20
Acquire 50,000 scrap
Acquire 100,000 scrap
Acquire 200,000 scrap
Craft a weapon using material from a defeated world boss
Upgrade a boss weapon to 5
Acquire Mudtooth's pocket watch
Return coin to Ace
Return ring to Reggie
Meet the Undying King
Meet the Swamp Queen
Meet the Pan Rebel Leader
Meet Andrew Ford
Defeat 5 Bosses in a row in Survival Mode
Defeat 10 Bosses in a row in Survival Mode
Purchase 15 Armor Skins
Purchase 40 Armor Skins
Defeat the Final Boss
Listen to all the Recordings in Ward Prime