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