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