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