Platforms:360 & PC (XP)

Left 4 Dead is an upcoming multiplayer co-operative survival horror first-person shooter game by Valve Corporation. The game has been built using Valve's Source engine and will be available on Microsoft Windows and the Xbox 360.

Left 4 Dead pits four human playable or AI controlled survivors of an apocalyptic pandemic against hordes of zombie-like, aggressive "Infected". The Survivors' goal is to help each other make it through various scenarios to safety. The Infected are controlled by an AI that dynamically balances difficulty and mood depending on the players' progress and situation. In an alternate game mode, human players can control up to four mutated Boss Infected with special abilities and cooperate to stop the Survivor players.

The expected release date for Left 4 Dead is November 18, 2008 in the U.S. and November 21, 2008 in Europe

Gameplay
Left 4 Dead is played in first person perspective, with full visualization of the player character's body.[4] Up to four players take control of the four main characters of the game, called "The Survivors". Survivors can also be AI-controlled bots. They play through the levels fighting off the Infected, which are humans who have been infected with a mutated form of rabies. Left 4 Dead is focused on cooperation and team play. Colored outlines that are visible through walls help players stick together and coordinate their movement. Survivors can be knocked down by the Infected and can only get up again with the help of a friend. Certain special attacks also require assistance to get out of. Survivors can share health packs and help each other heal. However, Left 4 Dead has full friendly fire that can't be switched off, but the damage caused is less for already injured Survivors.

The Survivors communicate by automated voice commands that are accessed by quick menus. They will also sound off automatically when doing such things as reloading or spotting Infected. Over 1000 unique lines have been recorded for each Survivor.

The game is experienced through four scenarios that take place in various urban and rural locales, such as a hospital, an airport and a murky countryside. Each scenario is divided into several shorter sections marked by safe-house checkpoints, where players can heal, re-arm, calm their nerves, save their progress and have killed players returned. The levels are neither linear nor completely open-ended or free-roaming. There are a number of alternate routes to follow with more supplies and alternate objectives. At the end of each scenario, the players must defend a position from an onslaught of Infected until rescue arrives. Each scenario lasts between 45 and 75 minutes.