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