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 Ancestors' Blessing' completed
Acquired 300,000 gold
'The Split Soul' completed
Completed 250 quests
'The Journey to the Underworld' completed
Collected 20 legendary items
'The Greedy Captain' completed
'Chaka Datu's Legacy' completed
'Steelbeard's Artefact' completed
'Garcia's Masquerade Uncovered' completed
Killed 2000 monsters
Dug up 50 treasures
Learned each skill once
'The Cunning Captain' completed
'Build a Raft' completed
'The Gnome Eater' completed
At least 5 crew members on the ship
Travelled by ship 20 times
Used monkey 20 times
Won drinking duel mini-game 10 times
'Ship's Equipment' completed
Collected 10 legendary items
Picked 100 locks
'Following Garcia's Trail' completed
'Four Muskets against Crow' completed
'The Titan Weapon' completed
'A New Ship' completed
Killed 50 sea monsters
'Free Hawkins' completed
'Find Steelbeard' completed
'Become a Pirate' completed
Acquired 100,000 gold
Found first treasure in the game
Drank first rum
Killed 10 giant crabs
Killed 20 ambient animals
Killed 500 monsters
Killed 10 monsters
Acquired 1000 gold
Won duel against Severin
'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