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