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