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