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