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