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