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