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