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.
Get the Kinship ending
Get all Achievements
Acquire all Hunt Points
Acquire all Weapons
Acquire all Outfits
Defeat Misbegotten Amalgam
Discover all Traits
Reach Max Breath Capacity
Defeat the Desert Watcher
Defeat Shidra
Get the Weakness ending
Activate all Beacons
Witness the Final Performance
Defeat the Grieving Rockgiant
Defeat the Harmless Rockgiant
Unlock all Nervepasses
Defeat the Jawstag
Discover all Prey
Accept all of the Coda's Gifts
Defeat the Artisan of Flesh
Unlock the Barrier Door
Have the final interaction with Yon
Fully Upgrade a Weapon
Defeat Shapely Fidus
Defeat the Jawcrab
Defeat Vulture
Reach Level 30
Pull down Prey
Defeat the Whispering Mothers
Absorb 100 Prey
Defeat Amalgam
Acquire a Hunt Point
Reach 100 Ardor
Discover a Trait
Activate a Surrogate
Obtain all Fetal Pearls