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