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