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