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