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.
Strengthened a weapon in wyrmfire.
Helped the gigantus walk again.
Witnessed the unmoored world.
Became Sovran of Vernworth.
Changed your vocation to trickster.
Changed your vocation to mystic spearhand.
Changed your vocation to magick archer.
Reached Dragonsbreath Tower.
Acquired a preserved medusa head.
Decapitated a medusa.
Soaked in the hot spring.
Returned to Agamen Volcanic Island.
Reached the maximum rank in a vocation.
Reached Drabnir's Grotto.
Passed through the gate at the border.
Used illicit means to pass through the gate at the border.
Set a pawn quest.
Purchased a dwelling of your own.
Boarded an oxcart.
Entered the rose chateau.
Attended a palace masquerade in formal raiment.
Used a Wakestone to restore the dead to life.
Used a Ferrystone.
Went camping.
Revived two pawns simultaneously.
Changed your vocation.
Taught your pawn a specialization.
Arrived in Vernworth.
Regained your memories of receiving the Arisen's charge.
Escaped the bonds of slavery.
Changed your vocation to warfarer.
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.
Acquired every maister's teaching.
Collected 80 Seeker's Tokens.
Earned the affections of 50 people.
Raised a person's affinity to the maximum.
Led the people to safety in the unmoored world.
Crossed a cyclopean bridge.
Summoned a harpy, grabbed hold, and took flight.
Obtained Dragon's Dogma.
Petrified a medusa.
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.
Defeated the headless horseman.
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.