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