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