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