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