Full list of all 49 Risen 2: Dark Waters achievements. It takes around 35-40 hours to unlock all of the achievements in the base game on Windows.
The base game contains 43 achievements, and there are 2 DLC packs containing 6 achievements.
'Kill Mara' completed
'Defeat the Kraken' completed
'The Split Soul' completed
'The Journey to the Underworld' completed
Collected 20 legendary items
'The Cunning Captain' completed
'Build a Raft' completed
'The Gnome Eater' completed
Completed 250 quests
'Ship's Equipment' completed
'Steelbeard's Artefact' completed
'The Ancestors' Blessing' completed
'The Greedy Captain' completed
'Garcia's Masquerade Uncovered' completed
'Chaka Datu's Legacy' completed
At least 5 crew members on the ship
Dug up 50 treasures
Collected 10 legendary items
Picked 100 locks
Used monkey 20 times
Travelled by ship 20 times
Killed 2000 monsters
'Following Garcia's Trail' completed
Won duel against Severin
'A New Ship' completed
'The Titan Weapon' completed
Acquired 300,000 gold
'Four Muskets against Crow' completed
'Free Hawkins' completed
Killed 500 monsters
Killed 50 sea monsters
Learned each skill once
Acquired 100,000 gold
'Become a Pirate' completed
'Find Steelbeard' completed
Won drinking duel mini-game 10 times
Killed 20 ambient animals
Found first treasure in the game
Drank first rum
Acquired 1000 gold
Killed 10 giant crabs
Killed 10 monsters
'Rescue Patty!' completed
Killed all gargoyles and gave their eggs to Eldric
'The Marooned Sailor' completed
'The Air Temple' completed
Opened every deadly chest once
Killed all alligators on Treasure Isle
Set course for Treasure Isle for the first time