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