Perfect Dark Zero Single-player action - Perfect Dark Zero challenges players to guide Joanna Dark on her journey to become the Perfect Agent. The fully interactive world includes beautiful graphics and breathtaking special effects combined with XBox Live functionality to p Action-packed Storyline - As Perfect Agent Joanna Dark, the story is set years before the original Perfect Dark in this sci-fi thriller centered on espionage, conspiracy and a mysterious global conflict. Online play via XBox Live - Supporting up to 50 players online, Perfect Dark Zero has online action and flexibility. Perfect Dark Zero includes fully scalable environments and complete XBox Live support with tournaments, rankings and more. Variety Gameplay option - Choose between a story-driven single-player campaign and various multiplayer options including four-player split screen and cooperative action for infinite replayability. Single-player action - Perfect Dark Zero challenges players to guide Joanna Dark on her journey to become the Perfect Agent. The fully interactive world includes beautiful graphics and breathtaking special effects combined with XBox Live functionality to p Action-packed Storyline - As Perfect Agent Joanna Dark, the story is set years before the original Perfect Dark in this sci-fi thriller centered on espionage, conspiracy and a mysterious global conflict. Online play via XBox Live - Supporting up to 50 players online, Perfect Dark Zero has online action and flexibility. Perfect Dark Zero includes fully scalable environments and complete XBox Live support with tournaments, rankings and more. Variety Gameplay option - Choose between a story-driven single-player campaign and various multiplayer options including four-player split screen and cooperative action for infinite replayability.