Here is the full list of all 37 Chained Echoes achievements.
Complete the Reward Board.
Learn all skills with all characters.
Slay the ultimate boss.
Complete the bestiary.
Find the platypus gang’s treasure.
Read all lore books.
Buy all Deals.
Get all ultimate weapons.
Defeat all Unique Monsters.
Finish all side quests.
Learn all skills for Tomke.
Find 12 Class Emblems.
Beat the game.
Get a Reward Board chain of over 120.
Master all Sky Armor weapons with one Sky Armor.
Sell 1 piece of crap.
Find the Crab Village.
Find all recruits.
Finish act III.
Get a Reward Board chain of over 80.
Find 6 Class Emblems.
Finish act II.
Master a Sky Armor weapon.
Win 200 battles.
Flee 42 times.
Finish act I.
Reclaim your Sky Armor.
Master a Class Emblem skill.
Get a Reward Board chain of over 40.
Join the Adventurer’s Guild.
Win 100 battles.
Get a Reward Board chain of over 20.
Win 50 battles.
Disturb 60 birds.
Get a Reward Board chain of over 5.
Find a Class Emblem.
Finish the prologue.