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