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