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