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