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