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