Left 4 Dead

Prepare for a co-operative action horror experience that plunges you into the heart of the zombie apocalypse. Up to four players will band together in an epic struggle for survival against relentless zombie hordes and terrifying mutant abominations.

Set in the immediate aftermath of a devastating outbreak, Left 4 Dead throws you into a desperate quest for survival. Navigate through four distinct "movies," each comprised of five sprawling maps. Traverse the rooftops of abandoned metropolises, ghost towns frozen in time, and pitch-black forests as you fight to escape Ground Zero, a landscape crawling with infected enemies. Team-based strategy and objectives are paramount to your success.

Experience a truly dynamic gameplay loop thanks to a revolutionary technology known as "the AI Director". This advanced system analyzes your performance and dynamically adjusts the frequency and ferocity of zombie attacks, ensuring that every playthrough is a fresh, intense, and challenging Hollywood-style horror movie.

• Engage in addictive single-player, co-op, and multiplayer action.
• Compete in Versus Mode: Go head-to-head in 4v4 battles, playing as either a desperate survivor fighting for rescue or a monstrous zombie determined to stop them.
• Test your endurance in Survival Mode: See how long you and your friends can hold out against the unending infected horde.
• Experience unique and intense gameplay every time thanks to the advanced AI Director.
• Explore 20 maps across four epic "movies" with 10 distinct weapons.
• Collaborative play is driven by matchmaking, stats, rankings, and an awards system.
• Go behind the scenes with the Designer's Commentary.

The Sacrifice

The Sacrifice is a pivotal add-on that acts as a prequel to "The Passing." Experience the L4D Survivors' journey southward, where a new style of finale awaits. In this "Sacrificial Gameplay," players must make a harrowing decision: who will give their life so that the others may live?

Owners of Left 4 Dead can play "The Sacrifice" campaign across Campaign, Versus, and Survival modes.