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