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