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