Consider it "Star Wars III and a Half" - complete with a pivotal plot twist. When LucasArts releases "Star Wars: The Force Unleashed" on Sept. 16, the video game will serve as George Lucas' official median between 2005's "Star Wars: Episode III - Revenge of the Sith" and 1977's "Star Wars: Episode IV - A New Hope." In the game, players become Darth Vader's secret apprentice and use The Force to hunt the remaining Jedi.