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