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