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