LEFT 4 DEAD

Have you ever wondered what life would be if there was a zombie apocalypse? Well this game will
make you realize what it feels like!

This game is a cooperative first person shooter , arcade style game where you need to survive against countless hordes of zombies... Yes.. ZOMBIES.

GAMEPLAY:

Left 4 Dead is a first-person shooter. In campaign mode, the player takes control of one of the survivors; if four human players are not available, then the remaining survivors are AI-controlled bots. They play through the levels fighting off the infected—living humans who have been infected with a rabies-like virus that causes psychosis. The survivors are carriers of the disease, so they do not show signs of any symptoms.



The game is focused on cooperation and team play and thus eschews some "realism" conventions usual in most FPS games of the wider genre; colored outlines of teammates are visible through walls to help players stick together and coordinate their movement. If a survivor falls off a ledge, then they may automatically hang onto it and can only be helped up by another survivor. If a survivor's health is depleted, then they become incapacitated and can only be revived by another survivor, at which point they continue playing with a low amount of health that decreases over time. If a survivor has been incapacitated and revived twice without tending to their wounds, then they will experience distorted black-and-white vision, and the next incapacitation will kill the character. If a survivor takes enough damage while incapacitated, or is not eventually helped up by teammates, then the incapacitated character will die. During "Campaign" mode, if a survivor is killed, then they will respawn in a closet or other enclosed space after a period of time (except during key points in the scenario), but must be freed by another survivor to rejoin the team. Otherwise, the player must wait until the next level. However, if all human player survivors are killed or incapacitated, players will have to restart from the last checkpoint. Survivors can share first-aid kits and pain pills and help each other heal. Left 4 Dead has friendly fire (which causes no damage on the easy difficulty mode), increasing the need for caution around other survivors.



The survivors communicate by voice commands that are accessed by quick menus, and some may sound off automatically when performing actions such as reloading or spotting infected. Over 1,000 unique lines have been recorded for each survivor. Additional communication of player actions is conveyed through character lights. Also, weapon-mounted flashlights and muzzle flashes help the players in determining whether their companions are shooting, performing melee attacks, reloading or moving. Due to control issues and the likelihood of players using a headset, the Xbox 360 version of Left 4 Dead omits the quick phrases feature.
The game is experienced through five campaigns that take place in various urban and rural locales. Multiple visual in-game hints—including license plates, park signs, markings on airport equipment, and lines of dialogue spoken by the survivors—suggest that these locations are in Pennsylvania,and similarly a memorial wall giving names of those who have died in the infection (actually names of the game's development team) along with their dates of birth and death suggests that the game takes place in October 2009. Each campaign is divided into five chapters (except Crash Course, which has two chapters) marked by safe rooms, which are checkpoints where players can heal, re-arm and revive characters who were killed. Specifically, the four campaigns are: "No Mercy", an urban setting culminating in a hospital skyscraper; "Death Toll", a small-town and countryside setting; "Dead Air", an airport setting; and "Blood Harvest", a woodland and farm setting. A two-level campaign, "Crash Course", was released on September 29, and is set in the outskirts of a small industrial town. The levels have distinct beginnings and ends, but there are a number of alternate routes to follow with more supplies, helping to create a sense of non-linearity.In the final chapter of each campaign, the players must defend a position from an onslaught of infected until rescue arrives. Each campaign typically lasts between 20 and 75 minutes depending on the difficulty level. Both platform versions of the game utilize an achievement system.

Survivor characters

The final design of the survivors, shown on the poster for the "No Mercy" campaign. Left to right: Francis, Bill, Zoey, Louis

There are four playable human characters in the game: Francis, a stereotypical biker (voiced by Vince Valenzuela); Bill, a Vietnam Veteran (voiced by Jim French); Zoey, a university student (voiced by Jen Taylor); and Louis, a district Account Manager (voiced by Earl Alexander). Louis' profession is now listed as a Junior Systems Analyst in the IT department for Franklin Brothers in Philadelphia, keeping in line with the comic released for "The Sacrifice" DLC. Early plans were for players to be randomly assigned to characters but in the final release, players can choose any character—provided that the character has not already been selected—or be randomly assigned an unselected character. Aside from appearances, all of the characters play exactly the same in-game.

Weapons

Survivors are armed with various firearms. Each player starts the game with a semiautomatic pistol. It may be reloaded an unlimited number of times and is the only weapon that the survivor can use when they are incapacitated. When a second pistol is found, the player can dual wield them, also with unlimited ammo. At the beginning of each campaign, the player can choose between a submachine gun and a pump-action shotgun. As the survivors progress through a campaign, more powerful weapons can be found: the fully automatic assault rifle (an upgrade to the submachine gun), a semi-automatic shotgun (an upgrade to the pump-action shotgun), and a scoped hunting rifle. A flashlight that can be toggled on and off is mounted on each firearm, with the exception of additional pistols. In addition to firearms, a player can also carry three other items in their inventory: improvised grenades (either a Molotov cocktail or a pipe bomb modified with an attached smoke alarm designed to attract the infected to it before it explodes); a first aid kit, which can be used to heal any survivor and pain pills, which provide temporary health that depletes gradually and quicker with damage from infected, and can be handed to teammates for later use. Regardless of what weapon or item a player is using, a melee attack can be used to shove away any infected within reach. Also available are environmental weapons, such as gas cans, propane cylinders, and oxygen tanks, all of which explode when shot. These environmental weapons can be picked up, moved, and used as a melee weapon by the survivors, but while carrying an object they cannot use their weapons or health items. Strategically placed minigun turrets are also encountered at various locations throughout the different maps.

Infected characters

The infected (voiced by experimental musician Mike Patton and voice actor Fred Tatasciore) are the survivors' foes in Left 4 Dead, and they appear to be partly inspired by the infected from several modern films, including Dawn of the Dead, 28 Days Later, or Quarantine. An important distinction from the former is that while the infected do resemble traditional undead zombies, they are, as cited in the game's manual, living humans infected with a rabies-like pathogen, very much like the infected in the later two films. While they are never seen eating human flesh or brains, multiple 'survivors' who have been killed by the infected appear throughout the game, and appear to have been partially eaten. In The Sacrifice comic, Zoey's mother is bitten in the face. She then begins to attack the rest of her family. One such victim can be heard saying "I can't believe he bit me!" before being encountered later on, fully infected. In an interview with 1Up.com, Mike Booth commented on the concept of using a pathogen as an inspiration for the setting:

“

Even though we obviously pushed well beyond the realm of believability with many of our "boss" infected, the core idea of a mind-destroying, civilization-collapsing pathogen is more horrifying to me than magically animated corpses, precisely because it is plausible. Rabies is a good example of a pathogen that can turn a loyal, friendly, protective family pet into a slavering attack machine. It is a virus that reprograms the behaviors of a complex animal – a mammal, in fact. What if something similar happened to humans? Left 4 Dead is one possible answer.

”

The common infected encountered during the game are fast and agile, weak individually, but may be overwhelming in numbers. They display a special attraction to high-pitched alarm-type sounds, such as the beeping device attached to pipe bombs and car alarms. Common infected will often chase down the source of these noises while ignoring lower-pitched, but much louder sounds such as gunfire. They occasionally attack in masses referred to in-game as a "horde".
In addition to the common infected, there are five "special" or "boss" infected whose mutations grant them special attacks that make them far more dangerous. Each of the special infected, as well as approaching hordes, have a distinctive sound or a timely musical cue, making their presence easily recognizable by players. There are five special infected in Left 4 Dead.

• The Boomer is a bloated infected that can spit vision-impairing bile on the Survivors, attracting hordes of infected, and explodes on death, spewing more bile in the immediate area. They emit burping and vomiting like sounds when close by. A 5-note double bass cue plays to signal Boomer.

• The Hunter is an agile foe that can jump and pounce on a survivor, and then tear at his victim until he is knocked off, kills his prey or is killed. A hunter emits animal like screeches or light roars when close by, and a snarling growl can be heard when in close proximity. The Hunter is signaled by a startling high pitched piano cue.

• The Smoker is a boil-covered creature with six long tongues that it uses to ensnare and drag a survivor back to himself. It may then either attack the survivor directly, allow the horde to attack him, or leave the survivor suspended over a cliff or roof-edge. The Smoker only releases its victim if a teammate shoves the ensnared survivor, if the tongue is shot, the survivor is killed, or upon the Smoker's death, which results in an explosion that leaves a vision-obscuring cloud. Smokers have raspy voices and frequently wheeze and cough, presuming that they may have been an avid smoker before becoming an Infected. A 2-note low piano cue signals the Smoker.

• The Tank is a gigantic, muscular infected that has the ability to swipe at survivors, knocking them off their feet and incapacitating them; it can also throw rocks and knock cars and other debris into the survivors. The Tank looks like its lower jaw is missing, but it's actually hidden in its neck muscle. The Tank is the most durable of all the special infected, and requires the full support of all of the survivors in order to be killed. The Tank is accompanied by a booming orchestral score to signal his appearance.

• The Witch is a female infected with long claws that stays crying in one spot. Survivors can often avoid the Witch but if they disturb her with light, loud noises or gunfire, she will become aggressive and charge at the one who "startled" her. Along with crying, an eerie choir tune plays when she is near. The Witch has the strongest attack of the infected in the game; able to kill a survivor outright with one blow on the hardest difficulty. As such she is not playable by human players in Versus mode.

In versus mode, four additional players can take control of the special infected—apart from the witch, who remains computer-controlled. Each infected player is randomly assigned a class of special infected when they enter a spawn mode. While in spawn mode, the infected can quickly roam around the map in search of an appropriate place in which to spawn. This location must be sufficiently distant from any survivor, out of the line of sight of any survivor, and outside restricted areas such as safe rooms. Upon death, the infected player must wait up to 10–25 seconds before re-entering spawn mode, depending on how many players are on the infected team. When a tank is spawned in the game, infected players receive a message indicating which player will control it. The human-controlled infected can see their teammates' outlines through walls similar to the survivors, but can also see each survivor's outline, which is colored according to the survivor's health and fades out if the survivor refrains from attacking, running and vocalizing. Vertical pathways exclusive to the infected, such as pipes and vines, are marked with animated symbols for the infected players. These can be climbed and used for ambushes.
Another special character, the "Screamer" was an infected tied to a strait jacket and heard by its maniacal cackling. He would not attack, but would run away if spotted and when he found a safe hiding place, he would emit a scream that would attract a horde of zombies to attack the survivors. The directors soon found him to be stressful, especially if he was in a crowd, so they removed him from the game. His horde-attracting power later turned into the Boomer's vomit attack, which they found to be fitting due to the Boomer's obese image.


SOURCE

CHEATS FOR THE NOOBS:

Cheat List

To insert the cheats below, call-up the in-game cheats console by pressing the tilde (~) key. Then, insert the cheats on the left for the corresponding result on the right.

• Buddha - Receive damage, but will not die
• give X - Give any item (where X = item name)
• god - God Mode
• impulse 10 - All weapons and ammunition
• nb_blind 1 - Infected cannot see you
• noclip - Walk through walls
• sv_infinite_ammo 1 - Infinite ammunition (no reloads)
• warp_all_survivors_here - Teleports all survivors to your position
• warp_all_survivors_to_checkpoint - Teleports all survivors to the nearest checkpoint
• warp_all_survivors_to_finale - Teleports all survivors to the finale
• warp_to_start_area - Teleport yourself to the next chapter

SOURCE