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