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