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