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