Here is the full list of all 47 GRIME achievements.
The base game contains 35 achievements, and there are 3 DLC packs containing 12 achievements.
Reach 100 Ardor
Acquire a Hunt Point
Discover a Trait
Activate a Surrogate
Defeat Amalgam
Activate all Beacons
Defeat the Artisan of Flesh
Discover all Traits
Reach Max Breath Capacity
Fully Upgrade a Weapon
Witness the Final Performance
Absorb 100 Prey
Defeat Vulture
Defeat the Harmless Rockgiant
Defeat Misbegotten Amalgam
Acquire all Hunt Points
Defeat Shidra
Acquire all Weapons
Defeat the Jawcrab
Defeat the Jawstag
Get the Kinship ending
Unlock all Nervepasses
Discover all Prey
Have the final interaction with Yon
Defeat Shapely Fidus
Defeat the Grieving Rockgiant
Defeat the Whispering Mothers
Acquire all Outfits
Get all Achievements
Unlock the Barrier Door
Reach Level 30
Defeat the Desert Watcher
Get the Weakness ending
Pull down Prey
Accept all of the Coda's Gifts
Obtain all Fetal Pearls