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