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