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