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