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