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