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