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