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