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