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