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