Joanna Dark is back in the Perfect Dark prequel, Perfect Dark Zero. When a routine mission uncovers a global conspiracy, it's up to you to get to the bottom of it. You take control of Special Agent Joanna Dark as she tries to become the perfect agent by unraveling the plot she's discovered. Perfect Dark Zero includes new weapons, vehicles, and environments to explore. In addition to story mode, there's competitive and cooperative multiplayer for up to four split-screen players or for up to 50 players over Xbox Live.