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