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