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