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
Killed 500 monsters
Learned each skill once
Completed 250 quests
Picked 100 locks
'The Ancestors' Blessing' completed
Travelled by ship 20 times
Dug up 50 treasures
Used monkey 20 times
Collected 20 legendary items
'Kill Mara' completed
'Defeat the Kraken' completed
'The Split Soul' completed
'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
'The Cunning Captain' completed
Killed 50 sea monsters
'Build a Raft' completed
'The Gnome Eater' completed
Collected 10 legendary items
'Ship's Equipment' completed
Won drinking duel mini-game 10 times
'Following Garcia's Trail' completed
Won duel against Severin
Killed 20 ambient animals
'A New Ship' completed
Drank first rum
'The Titan Weapon' completed
'Four Muskets against Crow' completed
'Free Hawkins' completed
Acquired 300,000 gold
Acquired 100,000 gold
Killed 10 giant crabs
'Become a Pirate' completed
'Find Steelbeard' completed
Found first treasure in the game
Acquired 1000 gold
Killed 10 monsters
'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
Killed all alligators on Treasure Isle
Set course for Treasure Isle for the first time