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