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 10 giant crabs
'Kill Mara' completed
'Defeat the Kraken' completed
Won duel against Severin
'The Greedy Captain' completed
'Garcia's Masquerade Uncovered' completed
'The Split Soul' completed
At least 5 crew members on the ship
Collected 10 legendary items
'Chaka Datu's Legacy' completed
'The Cunning Captain' completed
'Build a Raft' completed
'The Gnome Eater' completed
'Following Garcia's Trail' completed
'Steelbeard's Artefact' completed
'The Journey to the Underworld' completed
'Ship's Equipment' completed
'A New Ship' completed
'Free Hawkins' completed
'The Titan Weapon' completed
'The Ancestors' Blessing' completed
'Become a Pirate' completed
Found first treasure in the game
Drank first rum
'Find Steelbeard' completed
Killed 10 monsters
Acquired 1000 gold
'Rescue Patty!' completed
'Four Muskets against Crow' 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
Collected 20 legendary items
Killed 2000 monsters
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