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