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