The game will send three artificial intelligence characters to assist you. It also includes a campaign mode that you can play by yourself. Survival mode sends you to a new area of the map and awards you points based on how long you survive the zombie enemies coming at you.

In versus mode you play as part of a team of survivors and a team of zombies. Campaign mode is a cooperative mode that pairs you with one or more other online players. Left 4 Dead includes four impressive game modes. If your health meter runs out before you get to help, you die and must start the level over again. Different levels will also introduce you to other weapons like knives and swords and to first aid kits that you can use to heal yourself after an attack. You can find and use other weapons in various levels, and the game lets you carry up to two weapons at the same time. Though you only have a pistol at the start of the game, you have access to unlimited bullets. You then select one of the survivors and play as that character through multiple levels as zombies keep coming at you. The game shows you four survivors who manage to get across the city and find a helicopter to take them away, but you then discover that the pilot has the infection. You learn that the Green Flu spread across the city and turned humans into zombies.

Released in 2008, the game starts off with clips that explain what happened to new players. Left 4 Dead is a first-person shooter game that combines elements of horror with survival scenarios as you run for your life from zombies.

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