Full list of all 53 Fell Seal: Arbiter's Mark achievements.
The base game contains 43 achievements, and there is 1 DLC pack containing 10 achievements.
Master all 6 special badge Classes
Get the first ending
Get the second ending
Master all 19 base Monster Classes
Open all treasure chests
Complete the Ancient Path
Craft a final-tier weapon
Defeat Morgaine
Complete the Obelisk riddle
Obtain all gadgets
Master all Human story character Classes
Win the second Tournament
Visit the fifth Relic
Recruit Kairu
Save Somier a second time
Unlock the Spymaster Class
View all optional dialogue events
Defeat Lady Anquine
Cleanse the Cursed Shield
Complete the Halloween encounter
Visit the fourth Relic
Master all 20 base Human Classes
Recruit Katja
Unlock all 20 base Human Classes
Visit the third Relic
Defeat an enemy with falling damage
Open 50% of treasure chests
Win the first Tournament
Drown an enemy
Defeat at least 4 enemies with a single hit
Use your first Class badge
Recruit Bzaro
Defeat an enemy with a Berserk, Charmed, or Mind-Controlled enemy
Visit the second Relic
Unlock the Demon Knight Class
Recruit Yates
Visit the first Relic
Craft your first item
Master any Class
Unlock the Marked Class
Defeat a unit with its Elemental weakness
Change Class at least once
Defeat an enemy by using a Counter Ability or Thorns
Master all 22 Monster Variants.
Complete all unique Hunts and large-scale battles.
Complete all Missions.
Enlist each of the base 18 recruitable Monster types.
Fully upgrade all 5 regions.
Master the 3 new Human Classes.
Complete an encounter deploying only Monsters.
Defeat an enemy with a Pet Effect.
Complete 100% of Missions in one region.
Build a Guild Upgrade.