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