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