Full list of all 38 Dark Souls II achievements worth 1,000 gamerscore. It takes around 80-100 hours to unlock all of the achievements on Xbox 360.
Light all flames on the map in Majula
See the ending
Discover the covenant of the fittest
Discover the covenant of the protectors
Max-out devotion to covenant
Acquire Ashen Mist Heart
Discover the clangorous covenant
Discover the covenant of rodents
Acquire the King's Ring
Reinforce a weapon to its limit
Defeat Looking Glass Knight
Light the primal bonfire in the Black Gulch
Light the primal bonfire in the Iron Keep
Inherit Laddersmith Gilligan's equipment
Light the primal bonfire in Brightstone Cove Tseldora
Light the primal bonfire in Sinner's Rise
Inherit equipment from the head of Vengarl
Increase the population of Majula
Give Rosabeth of Melfia something to wear
Defeat the Last Giant
Die for the first time
Discover the covenant of the meek
Reclaim flesh and set out as an Undead
Earn all achievements
Defeat Vendrick
Learn all gestures
Learn all sorceries
Learn all miracles
Learn all pyromancies
Learn all hexes
Discover a most brilliant covenant
Discover the covenant of the bloodthirsty
Discover an ancient covenant
Discover the abysmal covenant
Inherit Benhart of Jugo's equipment
Inherit Captain Drummond's equipment
Inherit equipment from Lucatiel of Mirrah
Inherit Steady Hand McDuff's equipment