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