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