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