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