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