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