Assassin's Creed 3: Liberation is built on the same engine as Assassin's Creed 3: the AnvilMAX Engine.

That allowed Ubisoft to include many of the standard Assassin's Creed features that fans love: large and intricate environments, free-running, fully-rendered, active crowds, and even features new to Assassin's Creed 3, like running assassinations. Plus, it looks gorgeous, of course, on the Vita's gigantic screen.