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