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