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