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