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.
Taught your pawn a specialization.
Restored the dead to life at a morgue or charnel house.
Changed your vocation to trickster.
Changed your vocation to mystic spearhand.
Changed your vocation to warfarer.
Changed your vocation to magick archer.
Soaked in the hot spring.
Returned to Agamen Volcanic Island.
Reached Drabnir's Grotto.
Reached Dragonsbreath Tower.
Purchased a dwelling of your own.
Raised a person's affinity to the maximum.
Crossed a cyclopean bridge.
Revived two pawns simultaneously.
Entered the rose chateau.
Used a Wakestone to restore the dead to life.
Took flight on griffin wing a second time.
Reached the maximum rank in a vocation.
Used a Ferrystone.
Set a pawn quest.
Boarded an oxcart.
Arrived in Vernworth.
Went camping.
Regained your memories of receiving the Arisen's charge.
Changed your vocation.
Escaped the bonds of slavery.
Passed through the gate at the border.
Witnessed the unmoored world.
Became Sovran of Vernworth.
Helped the gigantus walk again.
Experienced the end of the cycle.
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.
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.
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.
Attended a palace masquerade in formal raiment.
Accomplished a miracle for several people all at once.
Defeated the headless horseman.
Discovered 50 dungeons.
Boarded the phantom oxcart.
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.