What is the title of the first Assassin's Creed game released exclusively for the PlayStation Vita?

Assassin's Creed III: Liberation was the first Assassin's Creed game released exclusively for the PlayStation Vita.

Ubisoft released Liberation in 2012 alongside Assassin's Creed III. It follows Aveline de Grandpré, an Assassin operating in 18th-century New Orleans and the Louisiana region. The game uses several identity-based disguises that affect how Aveline interacts with the world.

Liberation was initially a PlayStation Vita title, making it distinct from the console and PC releases of the numbered main entry. A remastered version was later released for other platforms, including PlayStation 4, Xbox One, Windows, and Nintendo Switch.

Assassin's Creed: Bloodlines was released for the PlayStation Portable, not the Vita. Chronicles: China and Identity were also released later and therefore do not fit the question.