In a time not far from now, a mysterious virus spreads rapidly among humans, turning them into zombies with psychotic bloodlust. But four people survived the epidemic and seem to be immune to the virus. Together they try to escape the violent infected (as they are called undead) through four campaigns, including urban and rural areas, each containing five maps.

Are allowed up to eight players that can join and leave the game at any time, without the map has to be restarted because the artificial intelligence immediately takes the place of an absent player. You can choose to be one of four survivors, among which there is the Bill, a war veteran, the Loius, an expert in electronic repairs, Zoey, a teenager from a wealthy family, and Francis, a big guy always willing to help .
But the player can also join the team of zombies, choosing to be an obese Boomer, who vomits in uninfected, blinding them; Hunter, who can climb walls and jump from buildings, the Smoker, who can strangle opponents with his enormous tongue, or Tank, a zombie who can throw cars and concrete blocks on top of humans. Each of the playable characters, both human, as those infected, has strengths and weaknesses that must be explored and compensated by the action team. The game offers unique configurations that help maintain a cooperative gameplay.

Left 4 Dead can appeal to fans of science fiction and shot, for bringing one of the best systems for a physical game lots of action and supernatural elements, in which much blood must be spilled to ensure their own survival.