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