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