Left 4 Dead
0Loading crowd target
0Loading crowd target
6correct to beat the crowd
50 free Left 4 Dead trivia questions with answers — trivia quiz, new questions added Oct 2026.
Left 4 Dead turned the zombie apocalypse into a team sport. A handful of strangers, a city full of the infected and a safe room somewhere ahead: Valve's 2008 shooter made co-operation the whole point, and players have kept coming back to it ever since. This quiz covers both games in the series. Expect questions on the original survivors and the actors who voiced them, the special infected and how each one attacks, the campaigns and their finales, and the story of how a small team's side project became a Valve classic. It is written for anyone who has ever shouted for help in a dark corridor. Casual players should recognise the early questions, while the later ones on scrapped ideas, crossovers and development history are aimed at fans who know every safe room. Every answer comes with a short explanation.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Which Left 4 Dead special infected sits crying in one spot and attacks only when disturbed?
The Witch
The Witch stays put until light, noise or a survivor coming too close startles her, and on the hardest difficulties she kills with one hit.
Q 02Left 4 Dead's infected are living humans carrying a pathogen modelled on which real disease?
Rabies
Rabies was the model: designer Mike Booth said a virus that turns a loyal pet into an attacker scared him more than magically animated corpses.
Q 03Why was the hand on Left 4 Dead 2's cover turned around for the UK release?
The gesture is an insult
The gesture is an insult in Britain when two fingers are raised with the back of the hand outward, so the UK cover flips the hand into a victory sign.
Q 04What household device is strapped to Left 4 Dead's pipe bomb so its beeping lures the infected?
A smoke alarm
A smoke alarm does the luring, because the common infected chase high-pitched sounds and ignore louder, lower ones such as gunfire.
Q 05What does Left 4 Dead call the AI that places enemies and items according to how players are doing?
The Director
The Director replaces fixed spawn points, and Valve had tried a simpler version of it in key battles of Half-Life 2: Episode Two.
Q 06Which country, then lacking an adult rating for games, refused to classify the uncut Left 4 Dead 2?
Australia
Australia had no adult rating for games in 2009, so players there got an edited version without dismemberment until the uncut game was cleared in 2014.
Q 07Bill, the old soldier among Left 4 Dead's four survivors, is a veteran of which war?
Vietnam War
The Vietnam War also features in Dead by Daylight, which added Bill as a playable survivor in 2017 and later expanded the story of his service.
Q 08Which British band let Valve print its imagery on Rochelle's T-shirt in Left 4 Dead 2?
Depeche Mode
Depeche Mode answered eagerly when Valve asked several bands to appear, and the game uses the group's music as well as the shirt.
Q 09Left 4 Dead began as a mod pitting players against knife-wielding bots in which Valve shooter?
Counter-Strike
Counter-Strike supplied the code for the mod, Terror-Strike, whose bots carried only knives and behaved so much like zombies that a horror game grew out of it.
Q 10Which Left 4 Dead survivor, a college student, has to shoot the infected pilot after No Mercy?
Zoey
Zoey kills the pilot moments after he lifts the group off the roof, bringing the helicopter down in an industrial district outside the city.
Q 11What is Francis, the Left 4 Dead survivor who hates everything except vests, described as?
An outlaw biker
An outlaw biker, Francis is voiced by Vince Valenzuela and is one of the three original survivors who turn up again in the sequel's campaign The Passing.
Q 12In The Sacrifice, why does Left 4 Dead's Bill leave his friends and face the horde alone?
To restart a generator
To restart a generator that failed while raising a lift bridge, Bill gives his life so the other three can sail away.
Q 13At the end of The Sacrifice, Left 4 Dead's remaining survivors set sail for which island chain?
The Florida Keys
Q 21Which Left 4 Dead campaign passes a church sheltering a paranoid man before a boathouse rescue?
Death Toll
Death Toll crosses the small town of Riverside, and the fishing boat that answers the call drops the survivors in a burning city across the river.
Q 22In Left 4 Dead's story, the outbreak that creates the infected begins in which US state?
Pennsylvania
Pennsylvania is where the first game opens, in the city of Fairfield two weeks after the first infection.
Q 23What nickname do the Left 4 Dead games give the infection that turns people into the infected?
Green Flu
Green Flu is the nickname used in both games, and neither the source nor the nature of the infection is ever made clear.
The Florida Keys were Bill's idea: he believed islands offered long-term safety, and the infected are unable to cross bodies of water.
Q 14Jim French, the radio host who voiced Bill in Left 4 Dead, also played which Half-Life 2 character?
Father Grigori
Father Grigori and Bill share a voice, and French went on to play the Elder Titan in Dota 2 while still producing radio dramas.
Q 15Which actress, the voice of Cortana in Halo, also voices one of Left 4 Dead's four survivors?
Jen Taylor
Jen Taylor has been Cortana since the first Halo in 2001, and she also voiced Princess Peach in Mario games for almost a decade.
Q 16Mike Patton, who voiced Left 4 Dead's common infected, is best known for fronting which band?
Faith No More
Faith No More's frontman supplied the snarls of the common infected, the Smoker and the Hunter, and he also voiced the Anger Sphere in Portal.
Q 17In Left 4 Dead, what happens when a survivor kills the bloated special infected that vomits blinding bile?
It explodes
It explodes: the Boomer bursts and showers anyone nearby in more bile, which draws a horde, so players hesitate to shoot it on sight.
Q 18What does the Smoker in Left 4 Dead use to snare a survivor and drag them away?
Its long tongue
Its long tongue can leave a victim dangling in mid-air, and killing the Smoker releases a cloud that hides everyone's view.
Q 19How does the Hunter, Left 4 Dead's hooded special infected, pin down a lone survivor?
By pouncing from afar
By pouncing from afar, the Hunter lands on a survivor and tears at them until a teammate shoves it off or kills it.
Q 20Left 4 Dead's opening campaign, No Mercy, climaxes with a rooftop rescue from what kind of building?
A hospital
A hospital named Mercy gives the campaign its title, and the survivors reach it through the city's streets, subway and sewers.
Q 24Which Left 4 Dead DLC campaign, set shortly after No Mercy, sends the survivors to a truck depot?
Crash Course
Crash Course is only two levels long and begins beside the downed helicopter; at the depot the survivors find the armoured truck that carries them onward.
Q 25In Left 4 Dead's campaign mode, where does a dead survivor reappear to be freed by teammates?
In a closet
In a closet or small room, and only a human player can let them out, because the computer-controlled survivors will not open the door.
Q 26Every Left 4 Dead survivor starts with which pistol, the only weapon with unlimited ammunition?
M1911
M1911 pistols can be carried in pairs once a second one is found, and the sidearm is the only weapon that still fires while a survivor is incapacitated.
Q 27What do pain pills do for a hurt survivor in Left 4 Dead, unlike a first aid kit?
Boost health temporarily
Pills only boost health temporarily, so the gain drains away, whereas a first aid kit heals properly and can be used on any survivor.
Q 28Left 4 Dead runs on a 2008 version of which game engine, upgraded for multi-core processors?
Source
Source gained multi-core support and physics-based animation for hair and clothing, yet one reviewer still said the engine was showing its age.
Q 29Which studio created Left 4 Dead and was bought by Valve partway through the game's development?
Turtle Rock Studios
Turtle Rock Studios took its name from the neighbourhood where founder Mike Booth lived, and the team first worked out of his garage.
Q 30Which Left 4 Dead 2 survivor, a talkative mechanic, keeps telling stories about his friend Keith?
Ellis
Ellis is voiced by Eric Ladin, who was allowed to ad-lib in the recording booth, giving the writers new ideas for the character's dialogue.