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