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