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