Here is the full list of all 54 Dragon's Dogma 2 achievements.
Discovered 50 dungeons.
Soaked in the hot spring.
Strengthened a weapon in wyrmfire.
Collected 80 Seeker's Tokens.
Changed your vocation to trickster.
Reached Drabnir's Grotto.
Took flight on griffin wing a second time.
Acquired a pawn badge.
Experienced the end of the cycle.
Defeated the headless horseman.
Witnessed the unmoored world.
Raised a person's affinity to the maximum.
Returned to Agamen Volcanic Island.
Used a Wakestone to restore the dead to life.
Passed through the gate at the border.
Attended a palace masquerade in formal raiment.
Taught your pawn a specialization.
Crossed a cyclopean bridge.
Reached the maximum rank in a vocation.
Purchased a dwelling of your own.
Changed your vocation to mystic spearhand.
Set a pawn quest.
Reclaimed your items from the scavenger who stole them from you.
Entered the rose chateau.
Went camping.
Boarded an oxcart.
Used a Ferrystone.
Arrived in Vernworth.
Revived two pawns simultaneously.
Regained your memories of receiving the Arisen's charge.
Changed your vocation.
Escaped the bonds of slavery.
Became Sovran of Vernworth.
Helped the gigantus walk again.
Changed your vocation to magick archer.
Changed your vocation to warfarer.
Defeated the gigantus in a short span of time.
Found a solution to every conundrum posed by the goddess of riddles.
Decapitated a medusa.
Acquired every maister's teaching.
Earned the affections of 50 people.
Led the people to safety in the unmoored world.
Overcame all the trials of the unmoored world.
Summoned a harpy, grabbed hold, and took flight.
Obtained Dragon's Dogma.
Petrified a medusa.
Acquired a preserved medusa head.
Grilled every type of meat during the night and day.
Restored the dead to life at a morgue or charnel house.
Accomplished a miracle for several people all at once.
Boarded the phantom oxcart.
Witnessed a brawl break out in your dwelling among your admirers.
Reached Dragonsbreath Tower.
Used illicit means to pass through the gate at the border.