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