The game is based on increased cooperation and team play is; Curves color of the visible players help through walls, players stick together and coordinate their movements, and survivors can be knocked over by people who are infected and only helped to settle with another player. Boss Infected also command special attacks, like the rush Hunter, vomiting Boomer, the language of the smoking-Choke, and the pool of votes (usually cast cars and pieces of asphalt) needed help from a teammate or thrown at you back floor. Survivors can also share the first-aid kits to treat and help each other. Left 4 Dead has full friendly fire during the advanced and expert modes, eliminating the need to pay attention to other survivors. It people with disabilities in Easy Mode. Survivors of voice commands that are accessed by quick menus, communicate, and some will be turned off automatically infected when doing things such as reloading or spotting. Over 1000 unique lines recorded for each survivor. Another message action of bodies is mediated by signs lit. Even weapons mounted flashlights and flash to help the players to see if their comrades are shooting, melee attacks to perform the reloading or moving. Because of control problems and the fact that players will probably live with a headset, the Xbox 360 version of Left 4 Dead fail fast response to movements. The game is divided into four scenarios that take place in various urban and rural areas, such as a hospital, an airport and a sad landscape experience. Each scenario into several smaller sections marked by checkpoints SafeHouse, where players take up arms again to calm the nerves and invigorate players who were killed. healing In particular, they can separate the four phases of the campaign mode: No Mercy (urban) Death Toll (small town / rural areas), forest Dead Air (Airport Property) and the blood harvested (/ rules of nature). These values are essentially linear, with clear beginnings and ends, but there are some alternative routes to follow with more supplies and alternate objectives and the concept of non-linearity. At the end of each scenario, the player has a position for an attack on infected until they get help. Each scenario should take between 45 and 75 minutes to defend .