Full list of all 56 Risen 2: Dark Waters achievements worth 1,100 gamerscore. It takes around 60-80 hours to unlock all of the achievements in the base game.
The base game contains 50 achievements worth 1,000 Gamerscore, and there are 2 DLC packs containing 6 achievements worth 100 Gamerscore.
'Chaka Datu's Legacy' completed
Won drinking duel mini-game 10 times
'Steelbeard's Artefact' completed
'The Journey to the Underworld' completed
Completed 250 quests
Travelled by ship 20 times
Killed 500 monsters
'Garcia's Masquerade Uncovered' completed
'The Greedy Captain' completed
'Ship's Equipment' completed
'The Gnome Eater' completed
'Build a Raft' completed
'The Cunning Captain' completed
Collected 10 legendary items
'The Split Soul' completed
'Defeat the Kraken' completed
'Kill Mara' completed
Learned everything about firearms
At least 5 crew members on the ship
Picked 100 locks
'Rescue Patty!' completed
'Find Steelbeard' completed
'Become a Pirate' completed
'The Ancestors' Blessing' completed
'Free Hawkins' completed
'The Titan Weapon' completed
'A New Ship' completed
'Following Garcia's Trail' completed
Hit 10 times in one game in the shooting mini-game
Acquired 1000 gold
Found first treasure in the game
Killed 10 monsters
Killed 10 giant crabs
Killed 50 sea monsters
Killed 20 ambient animals
Drank first rum
'Four Muskets against Crow' completed
Learned everything about blades
Learned everything about toughness
Learned everything about cunning
Learned everything about voodoo
Learned each skill once
Used parrot 5 times
Used monkey 20 times
Dug up 50 treasures
Won duel against Severin
Acquired 100,000 gold
Acquired 300,000 gold
Collected 20 legendary items
Killed 2000 monsters
Set course for Treasure Isle for the first time
Killed all alligators on Treasure Isle
Opened every deadly chest once
'The Air Temple' completed
'The Marooned Sailor' completed
Killed all gargoyles and gave their eggs to Eldric