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