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.
Acquire 30 traits
Defeat the Ent
Return ring to Reggie
Acquire 10 armor sets
Acquire 15 weapon mods
Acquire 200,000 scrap
Defeat the Totem Father
Return the Swamp Guardian's heart to the Undying King
Upgrade any weapon to +20
Acquire Mudtooth's pocket watch
Return coin to Ace
Defeat the Dreamer
Acquire 100,000 scrap
Meet Andrew Ford
Defeat the Ravager
Meet the Pan Rebel Leader
Defeat Ixillis XV
Meet the Swamp Queen
Acquire 5 armor sets
Acquire 20 traits
Upgrade a boss weapon to 5
Defeat the Undying King
Acquire 50,000 scrap
Meet the Undying King
Defeat 100 special enemies
Upgrade any trait to 20
Acquire 5 weapon mods
Upgrade any weapon to +10
Defeat the Claviger
Acquire 10 traits
Meet the Labyrinth Keeper
Defeat Singe
Craft a weapon using material from a defeated world boss
Upgrade Dragon Heart
Defeat a world boss in single player without taking damage
Meet the Root Mother
Upgrade any trait to 10
Activate the Ward 13 World Stone
Upgrade first weapon
Acquire first trait
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