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