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