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