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