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