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