Complex sentence: Throughout the film the audience is lead to believe Zep is Jigsaw; it's not revealed until the end that Zep is a victim of Jigsaw's "game" rather than Jigsaw himself.
Split into simpler sentences: Throughout the film the audience is lead to believe Zep is Jigsaw. Its not revealed until the end that Zep is a victim of Jigsaw's "game" rather than Jigsaw himself.