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