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