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