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