While many search for "free download" versions, it is important to note that Assassin’s Creed III: Liberation HD is a commercial title. It is currently available through several official channels:

Reliving Aveline’s Journey: The Evolution of Assassin’s Creed III: Liberation on PC

Set during the French and Indian War, Liberation follows Aveline, the daughter of a wealthy French merchant and an African slave. Her journey is deeply personal, focusing on the abolition of slavery and the defense of her community. Unlike the sprawling frontier of Assassin’s Creed III , Liberation is more intimate, centering on the bustling streets of New Orleans and the eerie, fog-filled Bayou. Unique Gameplay Mechanics

Even years after its release, Liberation remains a vital piece of the series' lore. It features a crossover mission with Connor Kenway and provides a grounded, social-political narrative that differs from the epic scale of later titles like Odyssey or Valhalla .