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