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