Here is the full list of all 37 Tree of Savior (English Ver.) achievements.
Transcended the equipment
Character became incapable of battle
Achieved Enhance Skill attribute Lv.100
Changed Class
Draw Gem
Repair item for the first time
Added a Companion
Equip item in the body costume slot
Achieved first Adventure Journal point
Sent a friend request
Changed Haircut at Beauty Shop for the first time
Successfully changed character's gender for the first time
Used Soul Crystal to ressurect
Added Socket to the Equipment
Destroyed equipment by enhancement
Participated at Team Battle League
Acquired Nukella for the first time
Ate food for the first time from the Refreshment Table
Cleared Level Dungeon for the first time
Clear Lepidoptera Junction: Legend (Hard)
Clear White Witch's Forest: Legend (Hard)
Clear Assister Dungeon Stage 40
Obtain Vaivora weapon
Dismantle legend item
Breakthrough the cage of Skiaclipse
Tried to enhance equipment
Purchased item from the Mercenary Badge Shop
Purchased item from the Contents Point Shop
Fail to enhance at +15 with an Anvil (Enhancing with silver, golden, ruby, and diamond anvil does not count)
Drew a Legend Assister Card
Fed the Cat in Klaipeda
Gave Like to someone
Tried Offering
Obtained Arch Stone
Visit the Fedimian Public House
Durability of the main weapon became 0
Sold an item at the market