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