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