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