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