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