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