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