Here is the full list of all 50 Risen 3 - Titan Lords achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Destroyed your soul rating until it was under 10
Completed 'Death Incarnate'
Completed 'Minions' Weapon Store'
Acquired 300,000 gold
Completed 'Cold Nights'
Acquired 100 attribute points in Spirit
Acquired 100 attribute points in Magic
Completed 'The Oracle's Soldiers'
Completed 'Green Flames'
Acquired 100 attribute points in Influence
Completed 'Zak's Temptation'
Completed 'The Reactor'
Acquired 100 attribute points in Ranged
Acquired 100 attribute points in Cunning
Acquired 100 attribute points in Dexterity
Acquired 100 attribute points in Melee
Acquired 100 attribute points in Toughness
Got at least 7 crew members on the ship
Completed 'The Kiss of the Dead'
Completed 'The Swearing-in Ceremony'
Completed 'The Ancient Covenant'
Won the Knife-throwing mini game 10 times
Killed 2000 monsters
Acquired 100,000 gold
Won the Drinking mini game 10 times
Won the Arm-wrestling mini game 10 times
Picked 100 locks
Used the monkey 20 times
Dug up 10 treasures
Used the parrot 10 times
Completed 300 quests
Completed 'The Missing Gnome'
Raised your soul rating until it is over 90
Collected 10 legendary items
Travelled by ship 20 times
Completed 'The Blue Flower'
Completed 'Booze's Befuddled Mind'
Completed 'Water Source Conflict'
Killed 500 monsters
Completed 'Menacing Shadows'
Killed 50 Shadow Creatures
Completed 'A Follower of Magic'
Completed 'Chaos in Harbour Town'
Killed 20 innocent animals
Completed 'Let's Get Out of Here'
Killed 10 Scavengers
Healed for the first time
Acquired 1000 gold
Found the first treasure in the game
Killed 10 monsters