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