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