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