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