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