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