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