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