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