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