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