Here is the full list of all 34 EARTHLOCK achievements.
Filled the library with mementos
Completed the game
Defeated one of every enemy
Arrived at the Memory Chamber
Unlocked all prison cells in Karba Prison
Cured Benjo and rescued Bran
Crafted one of every Perk Talent
Equipped a Talent in every available slot
Levelled up all Bonds to level 5
Levelled every type of plant to level 3
Grew a plant in every garden slot
Defeated the Hollow Knight
Dug up all treasure zones
Levelled all characters to level 20
Crafted one of every weapon
Scavenged all scrap piles
Received the Lys Aegis Talent from Lady Lumia
Released all the barnacles to play on Plumpet Beach
Got all the paintings for Plumpet Library
Planted one of every critter plant
Liberated the Great Wave
Assembled PAT
Gained Gold Rank in all Tournaments
Olia rejoined the party
Released all the Golden Bibis
Released 50 tormented Ghosts
Defeated the Mushriga
Opened 50 chests
Harvested 10 000 fruits
Rescued Taika from the goblin
Helped Ive after she crashed the plane
Arrived at Plumpet Island
Gnart joined the party
Defeated the Temple Guardian