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