Full list of all 56 Risen 2: Dark Waters achievements worth 1,100 gamerscore. It takes around 60-80 hours to unlock all of the achievements in the base game.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 6 achievements worth 100 Gamerscore.
Killed 2000 monsters
Acquired 300,000 gold
Learned each skill once
Learned everything about voodoo
Learned everything about toughness
Learned everything about firearms
Learned everything about cunning
'The Ancestors' Blessing' completed
Acquired 100,000 gold
Learned everything about blades
'Kill Mara' completed
Killed 500 monsters
'Defeat the Kraken' completed
'The Split Soul' completed
Collected 20 legendary items
'The Journey to the Underworld' completed
Dug up 50 treasures
'The Greedy Captain' completed
'Steelbeard's Artefact' completed
Picked 100 locks
'Chaka Datu's Legacy' completed
At least 5 crew members on the ship
Completed 250 quests
'Garcia's Masquerade Uncovered' completed
Travelled by ship 20 times
Used monkey 20 times
'Following Garcia's Trail' completed
'The Cunning Captain' completed
Used parrot 5 times
'Build a Raft' completed
'The Gnome Eater' completed
'Ship's Equipment' completed
Killed 50 sea monsters
Collected 10 legendary items
Won duel against Severin
'A New Ship' completed
'The Titan Weapon' completed
'Four Muskets against Crow' completed
'Free Hawkins' completed
Killed 10 giant crabs
Killed 20 ambient animals
'Become a Pirate' completed
Won drinking duel mini-game 10 times
'Find Steelbeard' completed
Hit 10 times in one game in the shooting mini-game
Found first treasure in the game
Drank first rum
Killed 10 monsters
Acquired 1000 gold
'Rescue Patty!' completed
Opened every deadly chest once
Killed all alligators on Treasure Isle
Set course for Treasure Isle for the first time
Killed all gargoyles and gave their eggs to Eldric
'The Marooned Sailor' completed
'The Air Temple' completed