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