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