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