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