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