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