Left 4 dead controls mac

The levels will only get harder. At the end of each chapter is a safe house with supplies, medkits, and ammunition. No zombies can enter it until you open the door, so this is a perfect place to catch your breath. Know that the items, enemies, and timing will change every game. Left 4 Dead 2 has a hidden AI Director that adjusts the game based on how you're doing. This means that you can't assume you'll get the same items or challenges each time you play. You need to be constantly adapting. If you decided to use a Medkit early on, assuming you'll get another one a few rooms down based on your last play-through, you'll be sorely disappointed when it doesn't appear.

Even the number and intensity of enemies will change from game to game. You need to focus on the present moment if you want to succeed. You must play to your current situation, instead of trying to figure out one perfect strategy for each level. Method 2. Mow down the common infected while trying to save ammunition. Your basic zombie, Infected, are fast-moving, easily killed generic zombies. Their power, however, comes from the fact that they attack in swarms.

There are two types -- "Mobs," which spawn behind you and hunt you down, and "Wanderers," who stand around until you run into them. When in a group, they are called "the horde. Kill Boomers from a distance. Big, fat behemoths, Boomers call attention to the horde. If they puke on you, you lose vision and all the Infected immediately attack you.

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To defeat them, shoot from a distance, or shove them away and then shoot if they get too close. When they die, they explode, puking on everything around them, so only kill from afar. They burp and gurgle, revealing them from a distance if you're listening. Stay away from high damage Spitter acid. Lanky female zombies, Spitters shoot acid on the ground that hurts everything it touches.

They also create a puddle of acid when they die. Dodge their acid and shoot from a distance. They make wet, spitting sounds. Strafe and kill Chargers from the side. They run in a straight line, pinning anyone in their path and knocking over objects in their way.

If they get you against a wall, they deal massive damage. Put as many bullets in them as you can, and if they charge, move to the sides to dodge them. They make loud grunting sounds like The Hulk might sound. Keep a teammate handy to deal with Smokers. Long range killers, they grab people with their tongue, drag them in, and beat them to death. If you get caught, a teammate can shoot the tongue, freeing you, or the smoker, killing them. You need to have teammates around to fight them.

You can also use shove to free a teammate. When you get caught, you have 2 seconds to find the smoker and shoot them before you lose control of your character. They cough and wheeze, but usually strike from a distance to hide. They are usually up high. Listen for growling to avoid dangerous Hunters. Massive damage dealers, they pounce on you and start slashing. Your other teammates must shoot them off you before you can get up. They are fast, dark, and hard to hit. If you hear one, bunch up back to back and get ready to shoot.

Hunters make a menacing growl right before they get ready to attack. Kill fast-moving Jockeys quickly to get them off your back. Little and fast, they jump on a character and control them, making you walk over ledges or behind walls, dealing damage the whole time. They are generally easy to kill, but if they get on your teammate, you need to be sure you shoot them, not the teammate. Their signature cackling laugh makes them easy to hear in advance. Handle the bosses with fire and teamwork. There are two boss characters in L4D2 -- Witches and Tanks. They come at specific locations, and they can kill an entire team if you're not careful.

When handling them, concentrated fire is always the answer. You need to focus on them before anything else, as they deal far more damage than any other Infected. If you're lucky, you can avoid most of them. They sit, crying until you wake them with gunfire or a flashlight. If you see one, turn off the light and try and creep around them. If you can't, use your first few shots to kill them as they wake up, aiming for the head as a team. Rifles to the head are your best bet.

You'll need fire to kill a tank. If you have a Molotov, hit them immediately - tanks on fire die in 30 seconds without any bullets. As you do, move around a lot to dodge them, surrounding the tank as a team and shooting continually. Method 3. Use items effectively in tense situations. Aside from weapons, there are other items available for pick-up, most of which should be reserved for tense or serious situations. Pain Pills: Gives you a temporary boost of health, though it will disappear after some time. This is incredibly helpful, however, for final events, where the extra boost saves a Medkit and gets you through the challenging events, allowing you to heal later fully.

Adrenaline Shots: Provides a small health boost, and boosts your running speed. Most importantly, it keeps you from "flinching," which is when you are temporarily unable to shoot after being hit. Use them right before huge moments, or if you need to get to a teammate to save them quickly. Bile Bombs: A grenade that causes all regular zombies to flock to the spot where it fell, ignoring you. If you throw it on another Zombie, the other Infected will attack them instead of you. Pipe Bombs: Like bile bombs, these cause Inflected to leave you and flock to the spot where you threw it.

After a few seconds, as the infected crowd the spot, the bomb explodes, killing them all. Molotov Cocktails: Explode on impact, and leave a temporary lake of fire that hurts all Infected and humans that walk through it. Great at creating walls against the hordes of dead, and essential against the monstrous "Tanks. Understand the advanced weapons. There is a variety of items and weapons available in Left 4 Dead, each with their own pros and cons.

When you start out, you will only have access to a small variety of them, but more powerful weapons and items will appear as you progress. Coming in chrome, pump, and automatic options, shotguns are great options in close quarters. They deal a lot of damage and have a wide spread of fire, but they are inaccurate at long distances. Use them in hallways and other tight locations. Powerful and accurate at long ranges, they are almost useless in tense, swarming situations because they take a while to aim and shoot. But they are great in a group and can clean up long-range, incoming enemies while the rest of the team waits patiently for them to reach shotgun range.

Automatic Weapons: Submachine guns, M16s, and their ilk are your bread and butter. They have good power and a high rate of fire, allowing you to mow down medium and close range enemies. When in doubt, choose automatic weapons. Method 4.

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Keep your distance whenever possible. Especially on the harder difficulties, melee weapons will only get you killed. Instead, stay back and pick off enemies from afar. Use your shoves to keep some distance, and, whenever you're in the open, use a pistol or rifle to thin the herd before they get too close. Predict the "flow" of the hordes by learning how they spawn.

Left 4 Dead is a constantly shifting game, and Infected will appear in unexpected places. Zombies spawn at various points, and they are on a timer. Special Infected like Hunters and Smokers can appear anywhere but usually, come with a horde of Infected to cause maximum damage. There are, however, ways to predict when enemies are coming: Pay attention to the music -- it will start to swell and get tense as enemies build up out of sight. Turn on subtitles. You can often read things like, "coughing sounds" or "noises of the horde" in advance, making it easier to predict incoming groups or specials.

Know the three stages of an attack. Build-up, as the music swells. Peak, when the big group descends on you, and Rest, after you've defeated them and have minutes to relax. Use choke-points and high ground to your advantage. When in crescendo events, or if you just need to catch your breath, choose spots with limited entryways like rooms with only doors or windows or high areas where you force the enemy to bottleneck. Bullets pierce enemies and hit the Infected behind them, meaning you can mow down large groups quickly and conserve ammunition.

Shooting down stairs, ladders, and in doorways can make big crowds much, much easier to handle. Still, keep moving when possible. Holing up for too long drains supplies and can leave you open to attacks by Boomers and Spitters. Conserve ammunition whenever possible. Ammo is your lifeblood, so don't go draining it. When enemies are at a distance or are easy to deal with, switch to a pistol or melee weapon. Running out of shotgun shells during an intense moment can cost you your life. Don't use medkits until necessary, usually after incapacitation.

Left 4 Dead was well received by the industry media upon its release, with praise given for its replay value, focus on cooperative play, and movie -like experience. Several criticisms were aimed at limited level selection and the lack of a narrative. As was done with Team Fortress 2 , Valve supplemented the game with free downloadable content.

The first, called the "Survival Pack", was released on April 21, Left 4 Dead was released for the Mac on October 28, The popularity of the game led to the development of a sequel, Left 4 Dead 2 , which was released on November 17, In July , all Left 4 Dead campaigns were ported over to Left 4 Dead 2 , with cross-platform multiplayer support between Windows and Mac versions of the game. Pennsylvania suffers an outbreak of "Green Flu"; a highly contagious pathogen causing extreme aggression, mutation to the body cells, and loss of higher brain functions essentially zombifying those who catch the flu.

Two weeks after the first infection four immune survivors—William "Bill" Overbeck voiced by Jim French , a Vietnam veteran; Zoey voiced by Jen Taylor , a college student; Louis voiced by Earl Alexander , an IT analyst , and Francis voiced by Vince Valenzuela , an outlaw biker —make their way through the city of Fairfield, only to discover that the infection is creating more dangerous mutations. After narrowly avoiding these new infected, along with hordes of others, the survivors are alerted to the presence of an evacuation point at the nearby Mercy Hospital roof by a passing helicopter.

Fighting their way through the city's streets, subway and sewers, they are rescued from the hospital's roof by the pilot, only to discover he is infected.

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With Zoey forced to kill him, the helicopter crash lands in an industrial district outside the city. Finding an armored delivery truck, the group uses it to make their way to the town of Riverside. However, they find the road blocked, and travel the rest of the way on foot. After an encounter with an infected maniac in the local church, they discover that the town is overrun, and decide to head to a nearby boathouse for rescue. Contacting a small fishing vessel, they manage to reach the city of Newburg on the other side of the river, only to find much of it in flames.

Seeking cover in a large greenhouse , their rest is interrupted when a military C Hercules passes overhead, leading the survivors to travel through the city's business district towards Metro International Airport.

Left 4 Dead 2

Upon arrival, the group see that in an attempt to contain the infection, the military had bombed the airport while infected pilots crash planes in an attempt to land; the runway however is largely intact, allowing the survivors to fuel up and escape in a waiting C Despite this apparent rescue, it crashes as well, and the survivors once again find themselves alone on the outskirts of Allegheny National Forest. Following a series of train tracks through the area, the group find themselves at a functioning, but abandoned, military outpost.

After answering a radio transmission, the survivors make their final stand against hordes of infected, before a military APC arrives to transport them to Northeast Safe Zone Echo, supposedly the only uninfected area not yet overrun. Instead, they are kept at a military installation and informed that even though they are immune, they still carry the infection. They are temporarily held by the military before the base is overrun with infected. The four escape via train and travel south at Bill's insistence; Bill believes that they can find long-term safety from the infected on the islands of the Florida Keys.

At the portside town of Rayford, they find a boat but must raise an old rusty bridge powered by an aging generator to get the boat into open waters, assured that the machinery noise will alert a large horde. However, the generator gives out. Bill sacrifices himself in order to restart it, so that the others may reach safety. After waiting for the horde to disperse, the three then encounter four more survivors. They move the boat to the other side of the bridge and help them re-lower the bridge so they can cross in their car. Afterwards, Louis, Zoey, and Francis head back to the boat and set course to the Keys.

Left 4 Dead is a first-person shooter in which the player takes control of one of four survivors; if 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. Although the survivors are carriers of the disease they do not show signs of any symptoms. The game focuses on cooperation and teamwork 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. 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. 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 version of Left 4 Dead omits the quick phrases feature. The game is experienced through six 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 , [8] 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 A two-level campaign, "Crash Course", was released on September 29, and is set in the outskirts of a small industrial town.

While The Sacrifice is a three-level campaign released on the 5th of October in , with an industrial port-side setting in Georgia. 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. Both platform versions of the game utilize an achievement system. There are four protagonists of the game: Survivors are armed with various firearms.

Each player starts the game with a semiautomatic pistol. 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: 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: 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. The infected voiced by experimental musician Mike Patton and voice actor Fred Tatasciore [15] 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 , and Quarantine. 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! In an interview with 1Up. 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. 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. 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.

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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. The artificial intelligence of Left 4 Dead features a dynamic system for game dramatics, pacing and difficulty called the "Director".

Instead of fixed spawn points for enemies, the Director places enemies and items in varying positions and quantities based upon each player's current situation, status, skill and location, creating a new experience for each playthrough. Valve has termed this dynamic set-up " procedural narrative ". It was created as a way to keep the music interesting throughout the game. The music Director monitors what a player has experienced to create an appropriate mix.

The process is client-side and done by a multi-track system.

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Each player hears their own mix, which is being generated as they play through the game, and dead players watching a teammate hear their teammates' mix. A far simpler version of the A. Director was previously used for some key battles in Half-Life 2: Episode Two. Valve is looking for ways to apply the Director in their future games to make pacing and difficulty more dynamic. Left 4 Dead contains four game modes: The cooperative campaign consists of up to four human-controlled survivors who attempt to make their way between safe rooms and eventually to rescue.

In this mode, the special infected are controlled by the AI. In a versus campaign, each team of one to four players plays each chapter of the campaign as both survivor and infected, swapping sides once per chapter. If at least one player-controlled survivor finishes the level, the survivor team earns points as well as bonus points based on their health and the health items in their inventory. These points are then multiplied by the chapter's difficulty level, and the number of survivors who finished. If all player-controlled survivors are killed, the survivor team only earns points according to their average progress through the chapter and the difficulty multiplier.

On Xbox , other players can join in on the same console to turn single player into an offline co-op game. The game can also be played through a system link, or local area network. Players have also discovered a way to do splitscreen co-op play with the PC version. Development on Left 4 Dead started in mid A teaser was released with The Orange Box. Turtle Rock Studios announced Left 4 Dead on November 20, , [28] and was acquired by Valve Corporation on January 10, , because of the game and long-standing relationship between the companies.

Valve also hosted photo contests called, "Dude, where's my thumb? Left 4 Dead uses the version of Valve's Source engine , with improvements such as multi-core processor support and physics-based animation to more realistically portray hair and clothing, and to improve physics interaction with enemies when shot or shoved in different body parts. Rendering and artificial intelligence were scaled up to allow for a greater number of enemies who can navigate the world in better ways, such as climbing, jumping, or breaking obstacles.

There is dynamic color correction that accentuates details based on importance, contrast and sharpening to focus attention on critical areas, film grain to expose details or imply details in dark areas and vignetting to evoke tension and a horror-film look. Left 4 Dead underwent many phases of development; influenced by playtesting , Turtle Rock Studios removed many of the features that were originally in the game. In the initial phases, there was another special infected, called the "screamer", which had no attacks but upon spotting a survivor would run to a safe place and then emit a loud scream that attracted a horde of infected.

This infected class was removed, but its ability to attract the horde was incorporated into the boomer's vomit. This would provide a score to rank a player's effectiveness as a teammate, [39] but this system was removed late in the development of the game in favor of immediate, non-persistent feedback displayed in-game. Another significant element removed was a long introduction between campaigns; because the game is designed for replayability, it was difficult to hold the player's attention for repeated viewings of cut scenes, so they were dropped in favor of a sparse narrative.

This led to Valve releasing a series of patches that allowed server operators to remove their server from the matchmaking "pool" of servers or make private servers. To promote the game and provide basic training to players before starting the game, Valve chose to develop a pre-rendered intro movie.

This movie was released on Halloween [49] and shows events prior to the beginning of the "No Mercy" campaign. Valve later detailed in their official Left 4 Dead blog how they designed the movie, from an intentionally very basic animation in the beginning of July to the final result for the launch of the game. Early access to the Left 4 Dead demo for people who pre-ordered the game began on November 6, , for both Windows and Xbox It gave users access to both online and single-player play in two "scenes" in one "movie" within the game.

This promotion was being offered in addition to the ten percent savings for those who pre-order and applies to all Steam Windows pre-orders and all Windows and Xbox pre-orders from GameStop and EB Games in North America. The demo had many server problems when it launched, primarily Valve's strategy for server management which made it impossible to set up a dedicated private server with administrator controls. On May 1, , the game was released freely via Steam as a one-day trial called "Freaky Free Friday". The trial was then extended to end on Saturday.

Left 4 Dead went gold on November 13, , and was released on November 18, , in North America ; and on November 21, , in Europe to coincide with the tenth anniversary of the release of Half-Life. Valve released a server patch in December to stop players on Xbox Live from using PC-style cheats. On February 5, , Valve released details about the upcoming downloadable content pack. The two full campaigns of "Death Toll" and "Dead Air" for versus mode—which were previously unavailable—are included, as well as the survival game mode, where the survivors try to survive endless waves of the infected for as long as possible.

On February 11, , Valve announced that the downloadable content for the game would be free for both the Xbox and PC; [62] and on April 21, it was released. This included a new set of plugins that allowed for users to import data from SketchUp , a free 3D modeling program, directly into the Hammer level editor for use in maps. The update included a command line tool for packaging custom Left 4 Dead campaigns to ease distribution.

Left 4 Dead

A sequel, announced at the E3 conference and was released November 17, It contains a new campaign called Crash Course , set shortly after the events of the No Mercy campaign, where the Survivors try to get to a Truck Depot after the helicopter they were in crashed. It is available for co-op, versus and survival modes, with various tweaks to game mechanics, and containing new locations and character dialog. The price was amended soon after, and all players who bought the DLC at the higher price were refunded.

On November 9, , a matchmaking update to allow for matchmaking between teams of four players in versus mode was released. An add-on campaign for Left 4 Dead 2 , "The Passing", featured the Left 4 Dead survivors meeting the new cast as part of a full campaign. The Left 4 Dead 2 content was set for release in March , however it was delayed until April 22, To connect the events in "The Passing" to that in Left 4 Dead , Valve released another add-on in October for both Left 4 Dead and its sequel, entitled "The Sacrifice"; the events of the add-on take place before "The Passing" and tells how the Left 4 Dead survivors come to encounter the group from Left 4 Dead 2 , and how one sacrificed themselves for the safety of the others.

Valve announced a page digital comic that has been revealed in four parts in the weeks leading up to the release of The Sacrifice. The comic begins with Bill, having just sacrificed himself to save the others, taking on three tanks while severely wounded.

It then cuts to the finale of Blood Harvest, which is revealed to be one week earlier. In The Sacrifice DLC, any player, whether playing as Bill or not, can choose to sacrifice themselves to allow the other survivors to complete the campaign. In March , Valve announced that it would be bringing the Steam content platform to Mac OS X computers; along with it, they will be providing native versions of existing Valve games including Left 4 Dead and its sequel. The game was released for Mac OS X on October 27, [83] Left 4 Dead support cross-platform play, allowing Mac players to play alongside PC players on the same servers, and is also part of the "Steam Play" cross-compatible and Steam Cloud titles, allowing a player that has purchased the game on one platform to download and play it on the other platform for free.

Overkill Software, the developers of Payday: The Heist , a similar game to Left 4 Dead featuring four player co-operative gameplay, announced in June that it has worked with Valve to create a DLC level for Payday in the form of a map mirroring the "No Mercy" level from Left 4 Dead , however, this DLC level is not canon to Left 4 Dead and does not lead to the infection that initiated the events in Left 4 Dead. Left 4 Dead received highly positive reviews from critics. On GameRankings , the game received aggregated scores of IGN stated, "It's almost pitch perfect in how it captures the tension and the action of a Hollywood zombie movie", and went on to describe it as, "quite possibly the perfect co-op shooter.

On October 28, , Valve reported that preorders for Left 4 Dead had beaten those of The Orange Box by 95 percent after the Steam pre-order was launched. Left 4 Dead received recognition as one of the best multiplayer and PC games of from various organizations and gaming publications. From Wikipedia, the free encyclopedia. For the franchise, see Left 4 Dead series.

November 17, November 18, AU: November 18, EU: November 21, October 27, See also: Dynamic game difficulty balancing. Retrieved February 25, Archived from the original on April 28, Retrieved January 23, July 11, Retrieved November 21, August 14, Left 4 Dead. No Mercy: The Subway developer commentary. Elan Ruskin: Each survivor has a large database of lines to choose from based on their present activity and a variety of factors, such as their health, stress level, kind of special infected seen so far, and many others.

Left 4 Dead Retrieved October 25, Valve's Doug Lombardi". July 3, Retrieved July 14, The things that are happening, all the shit that is hitting the fan and turning everyone into mutant zombies, has gone much bigger than just Pennsylvania, which is where the original game was loosely set. November 22, Retrieved May 11, January 17, July 23, Retrieved July 23, Left4Dead Interview.

Maximum PC. Retrieved October 26, Retrieved May 14, Retrieved August 11, Left 4 Dead is a game that venerates zombie movies throughout the ages, from George A. Left 4 Dead". PC Gamer. Retrieved January 20, How to Identify a Zombie". Big Download. December 2, Retrieved December 10,