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