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