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 30 traits
Defeat the Ravager
Return the Swamp Guardian's heart to the Undying King
Acquire 10 armor sets
Acquire 200,000 scrap
Defeat a world boss in single player without taking damage
Defeat the Dreamer
Meet Andrew Ford
Defeat the Totem Father
Acquire 100,000 scrap
Acquire 15 weapon mods
Meet the Pan Rebel Leader
Defeat the Undying King
Defeat Ixillis XV
Meet the Swamp Queen
Acquire 20 traits
Upgrade any weapon to +10
Return ring to Reggie
Defeat the Ent
Acquire 5 armor sets
Meet the Undying King
Acquire 50,000 scrap
Defeat the Claviger
Upgrade a boss weapon to 5
Defeat 100 special enemies
Acquire Mudtooth's pocket watch
Meet the Labyrinth Keeper
Upgrade Dragon Heart
Meet the Root Mother
Acquire 10 traits
Acquire 5 weapon mods
Craft a weapon using material from a defeated world boss
Defeat Singe
Upgrade any trait to 20
Return coin to Ace
Upgrade any trait to 10
Acquire first trait
Upgrade first weapon
Activate the Ward 13 World Stone
Defeat 10 Bosses in a row in Survival Mode
Purchase 40 Armor Skins
Purchase 15 Armor Skins
Defeat 5 Bosses in a row in Survival Mode
Defeat the Final Boss
Listen to all the Recordings in Ward Prime