Here is the full list of all 54 Dragon's Dogma 2 achievements. It takes around 80-100 hours to unlock all of the achievements on Windows.
Led the people to safety in the unmoored world.
Overcame all the trials of the unmoored world.
Obtained Dragon's Dogma.
Experienced the end of the cycle.
Helped the gigantus walk again.
Witnessed the unmoored world.
Became Sovran of Vernworth.
Defeated the headless horseman.
Defeated the gigantus in a short span of time.
Acquired every maister's teaching.
Witnessed a brawl break out in your dwelling among your admirers.
Changed your vocation to trickster.
Discovered 50 dungeons.
Accomplished a miracle for several people all at once.
Found a solution to every conundrum posed by the goddess of riddles.
Collected 80 Seeker's Tokens.
Earned the affections of 50 people.
Strengthened a weapon in wyrmfire.
Boarded the phantom oxcart.
Petrified a medusa.
Changed your vocation to warfarer.
Acquired a preserved medusa head.
Changed your vocation to magick archer.
Soaked in the hot spring.
Returned to Agamen Volcanic Island.
Reached Drabnir's Grotto.
Acquired a pawn badge.
Decapitated a medusa.
Reached Dragonsbreath Tower.
Passed through the gate at the border.
Used illicit means to pass through the gate at the border.
Attended a palace masquerade in formal raiment.
Grilled every type of meat during the night and day.
Crossed a cyclopean bridge.
Entered the rose chateau.
Changed your vocation to mystic spearhand.
Reached the maximum rank in a vocation.
Summoned a harpy, grabbed hold, and took flight.
Revived two pawns simultaneously.
Taught your pawn a specialization.
Purchased a dwelling of your own.
Used a Ferrystone.
Took flight on griffin wing a second time.
Restored the dead to life at a morgue or charnel house.
Used a Wakestone to restore the dead to life.
Reclaimed your items from the scavenger who stole them from you.
Raised a person's affinity to the maximum.
Boarded an oxcart.
Changed your vocation.
Arrived in Vernworth.
Set a pawn quest.
Regained your memories of receiving the Arisen's charge.
Went camping.
Escaped the bonds of slavery.