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