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