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