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