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