Full list of all 60 Remnant II achievements. It takes around 60-80 hours to unlock all of the achievements in the base game on Windows.
The base game contains 50 achievements, and there are 2 DLC packs containing 10 achievements.
Acquire a World Boss's Alternate Reward
Defeat Many Faces
Acquire 20 Melee Weapons
Acquire 30 Guns
Craft 15 Weapon Mods
Acquire the Max Number of Trait Points
Upgrade a Standard Weapon to +20
Upgrade a Boss Weapon to +10
Acquire 100,000 Scrap
Meet Nimue
Defeat the Nightweaver
Acquire 10 Relics
Obtain an Item From the Nightweaver's Web
Defeat 25 Aberrations
Acquire 15 Guns
Defeat the Final Boss
Listen to All of Mudtooth's Stories
Obtain 10 Traits
Acquire 10 Melee Weapons
Acquire 50,000 Scrap
Upgrade a Weapon Mutator to +10
Upgrade a Boss Weapon to +5
Reach Level 10 on Any Archetype
Defeat Guardian of N'Erud
Defeat 10 Aberrations
Meet the Custodian
Defeat a Boss in Single-Player Without Taking Any Damage
Obtain a Secret Archetype
Craft an Item at the Blood Moon Altar
Upgrade a Standard Weapon to +10
Receive an Alignment Reading from Meidra
Discover Leto's Stash
Defeat the Labyrinth Boss
Defeat Tal'Ratha
Upgrade Relic Capacity
Defeat 100 Special Enemies
Upgrade Any Trait to 10
Discover a Blood Moon Room
Craft a Boss Weapon
Craft a Non-Starter Weapon Mod
Defeat the Ravager
Defeat a World Boss
Slot a Second Archetype
Meet the Flautist
Obtain a Non-Starter Trait
Choose Your First Archetype
Defeat the Root Mantis
Defeat the Fae Imposter
Acquire 20 traits
Play a Secret Song on the Water Harp