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 'The Swearing-in Ceremony'
Acquired 100 attribute points in Ranged
Acquired 300,000 gold
Completed 'Death Incarnate'
Completed 'Cold Nights'
Completed 'Minions' Weapon Store'
Acquired 100 attribute points in Spirit
Acquired 100 attribute points in Magic
Acquired 100 attribute points in Cunning
Won the Knife-throwing mini game 10 times
Acquired 100 attribute points in Melee
Travelled by ship 20 times
Completed 'The Reactor'
Acquired 100 attribute points in Influence
Acquired 100 attribute points in Toughness
Completed 'Menacing Shadows'
Completed 'A Follower of Magic'
Acquired 100,000 gold
Acquired 100 attribute points in Dexterity
Dug up 10 treasures
Picked 100 locks
Killed 2000 monsters
Completed 'The Missing Gnome'
Won the Drinking mini game 10 times
Won the Arm-wrestling mini game 10 times
Completed 300 quests
Used the monkey 20 times
Completed 'The Oracle's Soldiers'
Got at least 7 crew members on the ship
Completed 'Booze's Befuddled Mind'
Completed 'Water Source Conflict'
Completed 'The Blue Flower'
Raised your soul rating until it is over 90
Completed 'Zak's Temptation'
Completed 'Green Flames'
Collected 10 legendary items
Healed for the first time
Completed 'The Ancient Covenant'
Killed 500 monsters
Killed 50 Shadow Creatures
Used the parrot 10 times
Killed 20 innocent animals
Completed 'Chaos in Harbour Town'
Completed 'Let's Get Out of Here'
Killed 10 Scavengers
Acquired 1000 gold
Found the first treasure in the game
Killed 10 monsters
Completed 'The Kiss of the Dead'
Destroyed your soul rating until it was under 10