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