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Louis: We made it... I can't believe we made it!
Bill: Son, we just crossed the street. Let's not throw a party till we're out of the city.
-Left 4 Dead

Coach: Wait for official instructions. (laughs) Wait my ass.
Ellis: Kill all sons-of-bitches. *pumps shotgun* That's my official instructions.
-Left 4 Dead 2

A cooperative First Person Shooter proclaimed by its advertising as "the Zombie Apocalypse you can play with your friends", Left 4 Dead reduces the zombie genre to its absolute basics: You are one of a Quartet of Ragtag Misfits caught in the middle of the outbreak of a deadly virus that's turning people into bloodthirsty mutants. Your objective is to make your way from safehouse to safehouse through an area infested with these murderous creatures, and finally reach a pickup point from which to summon the cavalry to spirit you to safety.

Of course, this won't be easy: there could be a herd of thirty zombies, or just one extremely powerful mutant zombie, waiting around the next corner. The game's "AI Director" is watching your progress and planning your next sudden encounter — every time you play is a different experience. He's ready to send a horde of zombies at you whenever the situation calls for it, or just if he's bored. Which is all the time.

More anticipated, perhaps, than the Campaign mode (in which four players step into the Survivors' shoes) is Left 4 Dead's Versus mode, in which eight players, trading off between rounds, control either the Survivors or the dangerous Boss infected: the long-tongued Smoker, the lightning-quick Hunter, the nauseous (and explosive) Boomer, and the Tank. (There's a fifth boss — the Witch, who doesn't react well to flashlights and loud noise — but like the Horde she's not actually a playable character.) The goal of Versus isn't to make it to the next safe room; nine times out of ten, you won't. The goal is to make it farther than the other team. You don't survive unless you're professionals or the other team is pretty bad.

The expansion pack takes it further with the ironically-titled Survival Mode: the irony lies in the fact that "survival" is pretty much the last thing you'll be doing. The question is how long you and your friends can hold out against an all-out Infected onslaught before you all die.

In 2009, a sequel was confirmed less than a year after the original. The official L4D blog mentions "...a much larger game than the original, and features new co-op and versus campaigns, all-new Survivors, boss zombies, weapons, and items, as well as melee combat". An official trailer gives a release date of Nov. 17. Unfortunately, Valve's generosity with Team Fortress 2 updates promptly backfired, as large numbers of people were outraged that they were expected to buy content they were under the impression they'd get for free; this gave rise to the biggest outburst of Ruined FOREVER, uhhh, ever: a 40,000+ people boycott. A month before the sequel was due, the leaders of the boycott shut the group down after Valve's release of a new campaign for the original, "Crash Course".
Tropes:
  • Abandoned Hospital: The first campaign of the series involves one of these; you have to get to the helipad on the roof to get a lift out of the city.
  • Abandoned Warehouse: Nearly every campaign features one.
  • Absurdly Spacious Sewer: At least two of the campaigns feature sewers that are big enough to accommodate whole mobs of zombies for the players to fight off. Not much time is spent in them though.
    • The one in the first campaign is actually about the right size for Philadelphia (which is what the levels are supposedly based on).
  • AKA 47: Done subtly: although the real guns in the game are not named, zooming in on the gun models reveal they are made by fictional companies. For instance, the 1911 pistols are made by "Finleyville Armory" (a play on Springfield Armory), the M16 is made by "American Armory", and the pump shotgun is made by "Renegade" (Remington).
    • Ironically, the AK-47 in Left 4 Dead 2 is named AK-47.
      • Even more ironically, it's an AKM.
  • All There In The Manual: Actually, it's all there in the opening cutscene. Pay close attention and you might live longer.
    • Not to mention the back stories of the characters are actually only explained in the manual, although by taking a look at their character models and hearing some of their dialogue you could probably guess what they are without reading it.
      • Only applies to Xbox 360 owners. PC owners only get a scrap of paper with instructions on how to play and the activation code. At least the internet is there for the research.
    • Also in the new trailer for the second game. It clearly shows all the different new infected doing their thing, with the new weapons, and even the new uncommon common: hazmat zombies (who are immune to fire), zombies in riot gear (Who are immune to bullets), swamp zombies (who move even faster and blind the person they hit), and finally, zombie clowns (which emit a screech that draws all common infected to them).
  • Alternate Character Interpretation: An early version of this page offered one that completely killed the witch's scariness for this troper (emo teen), then managed to come up with another view that brought it clawing back out of the grave twice as strong (zombie rape victim). *shudder*
    • Alternatively...
    • Wait, would that be a woman who was raped by a zombie or infectee, or a rape victim who was zombified? Sadly, I'm not sure which is worse.
      • Rape victim who was later raped by zombies, then zombified, then raped by zombies again. And then raped by survivors.
      • what
  • An Axe To Grind - L4D 2 adds an axe, among the other melee-centered weapons.
  • Artificial Brilliance: The special infected are quite smart and are very wary of the presence of the players. Hunters and Boomers will always try to hide around corners or behind thick shrubs so that they can ambush the players. The two may also tag team players if a player is caught by a smoker. Tanks can try to avoid fire the player makes, assuming the player sets the fire off too early. While they can be quite stupid at times, it doesn't happen too often.
    • Tanks are now much smarter in the sequel. When they down someone, they will usually go chase the other survivors instead of just pounding one till they're dead and become a sitting duck.
  • Ascended Meme: In Crash Course, in the safe room before the finale, some woman has written a sappy poem about her dead love. Later survivors crapped all over it with various internet putdowns like "QQ" and "Cool story bro!".
  • As The Good Book Says: In Death Toll's "The Turnpike," there's safehouse graffiti where someone wrote "Exodus 9:15" in large letters. If you happen to look up that particular verse ...
    "For now I will stretch out my hand, that I may smite thee and thy people with pestilence; and thou shalt be cut off from the earth."
    • Not to mention all the new bible quotes in the new one- though who can hate them when we get great quotes like:
      Coach: Though I walk, through the valley of the shadow of death...
      Ellis: Yeah! I'm walk'n in that valley'n I'm kick'n some ass!
  • Artificial Stupidity: The Survivor bots. If you are pounced by a Hunter or grabbed by a Smoker, the Survivors may shoot lesser zombies near you instead of trying to get you free. They are worse in Survival and VS mode where even if their melee attack has to cool down, they will still try to do it.
    • This often borders on the bots just plain hating their teammates for some inconceivable reason. Combine this with the ever-hateful Director, and every difficulty level in singleplayer becomes Expert.
  • Awesome But Impractical: The minigun, which can shred oncoming hordes like no other, is never positioned so it can effectively cover more than two of the generally five or so directions that zombies can come from.
    • And for some unimaginable reason, the Director likes to throw the Horde at you in the directions it can't cover. Funny, that.
  • Awesome Moment Of Cr0wning: Killing a witch with 1 headshot nets you the "Cr0wnd" achievement.
  • Back Stab: Not in a literal sense, but performing a melee attack on a zombie from behind kills them in one hit and earns you the Spinal Tap achievement. Special infected are immune to this.
  • Badass Biker: Francis
  • Badass Creed : Played over the title card in the commercial for extra badass points:
    Bill. I'll see peace back on earth if I have to murder every one of these animals with my own bare hands!
    • Another one, From the Sequel:
      Nick: We are walking through the valley of the Shadow of Death, and kickin' ass!
  • Badass Normal: All four eight of the Survivors.
    • Special note is Louis, though, who is easily the most normal of the four.
      • The original featured a Green Beret, a biker, a college student, and an office worker. The sequel's survivors are a bit more "normal", with a mechanic, a coach, a reporter, and a con man.
  • Badass Grandpa: Bill, Vietnam vet and former Green Beret.
  • Bag Of Spilling: The intro cinematic shows all the survivors using guns that they don't start with. But during that intro, they either drop them, run out of ammo, or are disarmed, and so when the game opens they're just toting pistols. Additionally, this happens at the opening of each campaign as well.
  • Berserk Button: Shine flashlight/walk up near/stare too long at/shoot gun near or at the Witch, and you have to deal with a fast zombie who can kill you dead in a heartbeat. Of course, after accomplishing that, she screams in horror and runs away.
    • When playing on Expert difficulty, the Witch will one-shot you if her claw connects.
  • The Big Easy: At least part of the sequel will take place in New Orleans, or a reasonable fascimile thereof.
  • Big No: Any of Survivors' will let loose a Big No if attacked by a special zombie. Especially Louis.
    Louis: Get it off me! Get it off me! GET IT OFF ME!
  • Body Horror: The Special Infected have undergone horrible and probably quite painful mutations. Have you seen the concept art for the Spitter yet?
    • Not to mention the new look for the Smoker in Left 4 Dead 2. Tongue out of neck = D:
  • Boom Headshot: It's possible to kill a witch in one hit with a shotgun to the head. But you have to be so close that if you fail, it is very likely she will drop you. This can be avoided on lower difficulties by spraying shotgun bursts into her while she stands up.
  • Bond One Liner: If you walk over to the helicopter pilots body in Crash Course...
    Zoey Pilots License.... Revoked! Dun Dun DUNNN!'''
  • Bottomless Magazines: The players must reload, but they've endless ammunition for their sidearms and supply caches provide infinite replenishment for your main weapons.
  • Breather Level: Although it's definitely not on your side, the AI director does tend to give you a breather inbetween swarms of zombies or boss encounters, especially if you're just limping through.
    • If you're playing on Expert level (the hardest), only in certain areas will you catch a breath. You get twenty seconds, tops, before a horde is spawned anywhere else.
    • All difficulty levels have a breather section mid-chapter in No Mercy Chapter Four while riding the elevator where the survivors have a short conversation before the level continues.
      • Except on Versus, where the hole in the elevator's roof suddenly becomes a bigger problem.
  • Butt Monkey: Ellis, as of the newest trailer for Left 4 Dead 2. Jockey, Charger, and Smoker all want a piece of him.
  • Captain Obvious: Ellis, upon spotting a statue of a horse in a park.
    Ellis: HORSE!
  • Chainsaw Good - One of the new weapons in L4D 2.
  • Character Filibuster - In the Crash Course DLC level, one of the notes on the wall of the safe room is a full-length Purple Prose-choked love poem by some woman to her dead lover. It takes up nearly half the wall. The other half of the wall is taken up by rebuttals either mocking her or telling her to shut the fuck up.
  • Cherry Tapping: It's possible to kill even the special Infected just with the secondary melee attack. Just don't try it on the Boomer.
    • In fact, some people encourage spamming your melee attack on Hunters and Smokers since you can keep juggling them to prevent them from attacking and it saves ammo. Of course, this doesn't totally work out in VS mode due to the melee recharge time.
  • Chiaroscuro: Actually used by the developers to guide the players, after they noticed playtesters' tendency to move toward the brightly lit areas.
  • Cliche Storm: For zombie movies. Though this is probably intentional on the part of Valve. If you read the writing on the saferoom walls, many of them are somewhat mocking of the Zombie genre.
    • Overall, Cliche Storms are acceptable in video games that are deliberately attempting to evoke the feel of a particular film genre.
  • Combat Tentacles - The smoker's ability.
  • Complacent Gaming Syndrome: Mostly noticeable in VS mode where players on the Survivor side only use uzis and auto shotguns (sometimes assault rifles) and they will scream at or make fun of the people who dare to use pump shotguns or hunting rifles.
  • Cool Car: The escape vehicle at the end of "Crash Course" is a bus. That has undergone some A-Team style modifications.
  • Cool Old Guy: Bill.
  • Crazy Survivalist: The Survivors, although Bill and Francis probably qualify best.
    • Arguably Zoey also qualifies, in that she apparently spent most of her college career watching zombie films, though given that Its All There In The Manual, her supposed Genre Savvy is reduced to an Informed Ability.
      • Zoey exhibits Genre Savvy traits in-game with a number of her voice commands, usually spotting trouble from abandoned cabins, creepy hospitals or suspicious moments of calm. And she complains at one point that they run. "I'm calling zombie bullshit on this! They're not allowed to be that fast!"
      • Overall, the virtues the game promotes, such as not splitting up and conserving/sharing health and ammo, are pretty Genre Savvy.
    • Louis also spent most of his lunch breaks practicing at a nearby rifle range.
  • Critical Existence Failure: Averted. When seriously injured, you run slower, jump lower, and if you're on pain pills or just brought up by teammate, your health is constantly sapped away. Also, when your health runs out, your character is stuck in one spot on the ground, only able to use their pistols.
    • And when you're really in trouble (out of hitpoints and out of revivals) your vision goes black and white and your heart starts throbbing loudly.
  • Crowning Moment Of Awesome: Each of the four campaigns ends with a finale calling for a rescue vehicle to pick up the Survivors. As the vehicle arrives (or the fuel is pumped in the case of the airplane for Dead Air), the Survivors must defend themselves against waves upon waves of common and special infected and fight two different tanks. Once the rescue is ready, the Director throws everything possible at the Survivors to try to kill them before they can board the vehicle.
  • Crowning Moment Of Funny: The reactions to friendly fire is sometimes over the top but also funny at the same time with lines like "GOD DAMMIT, WATCH YOUR FIRE!" or "I can't believe you just shot me again!" Some of the lines spoken in certain maps can also provoke laughter, such as this scene in the 4th map of Death Toll:
    Louis: Riverside's a bust. Let's just head to the river.
    Francis: That's better than my plan.
    Bill: What was that?
    Francis: I didn't have one.
    • Of course, any dialogue involving the crazy church guy is also a barrel of laughs, especially with Zoey and Francis' replies to the church guy.
    • A lot of the new dialogue in Crash Course is hilarious, such as Zoey referencing "the latest issue of I Hate Everything".
    Francis: I hear a witch! *sniffs the air* And it's close!
    • The moment re:Your Brains was confirmed to be a jukebox song in Left 4 Dead 2.
    • Most of Nick's banter in L 4 D 2. Especially when it sounds like he's channeling Tourettes Guy.
  • Crowning Music Of Awesome: In Left 4 Dead 2, RE: Your Brains can be played on a jukebox.
  • Deadly Lunge: What the Horde does when it notices the Survivors' presence. Also, the Hunter's preferred M.O., which allows him to dash several yards in one swipe.
    • In Left 4 Dead 2, the new infected The Jockey does this also.
  • Deadpan Snarker: Surprisingly, Francis, but seemingly in Crash Course only where he has variations of asking (or insulting) Louis (or SUNSHINE BEAMS) if he still feels positive after the helicopter crashed.
  • Dead Weight: The Boomer, of course!
  • Dedication: If you die during the finale you don't get to respawn, but as long as at least one character escapes, the credits will start with "In memory of [Player Name]"
  • Deep South: Left 4 Dead 2 will cover the area between Louisiana and Georgia.
  • Deliberately Monochrome: After being downed and revived twice, you see the entire world in black and white, complete with blurry peripheral vision and red item highlights. If you're not healed, you will die. The developers included this because playtesters were frustrated when inexperienced players were repeatedly going down and delaying the group.
  • The Director Is A Cheating Bastard: Unusual, in that the Director is supposed to be continuously tweaking the challenge of the game up and down based on how well the players are doing. However, on Expert, it seems to only tweak it in one direction, where its response to you doing poorly is to punch you in the face, and its response to you doing well is to kick you in the balls.  *
    • This goes for the survivor bots too, as they have aimbot-like accuracy, and cannot cause friendly fire (being able to literally shoot through others). It works, as a half-decent human player is still more efficient overall (due to other factors like bots not being able to use grenades or any particular strategy beyond shooting things), yet a team isn't completely screwed if a player leaves mid-game.
    • "Tweaking difficulty" generally, in this game, translates to the amount of pressure it keeps on you, or the amount of medkits and pain pills it grants. 20 points from a Horde attack, though, means you need to play -perfectly- or you won't live to see the extra pain pills and medkits..
    • Not to mention on Expert, when you need the medkits most, only gives you pain pills, reserving the medkits for saferooms and the finale.
    • The recent DLC Survival Mode has the Director being even more of a Jerk Ass; though that is the whole point of the mode. Two tanks? Same time? With no lull in fighting the regular zombies to heal up/rearm?
      • On the flip side, Tanks have much lower health than in any other mode.
      • This troper at one point managed to be pounded by a Tank while being dragged by a Smoker, scratched by a Hunter, and on fire from a malevolent teammate who found the molotovs. About the only positive from that was the Tank managed to accidentally kill the Hunter at the same time it killed me.
      • The Tank also does the same thing in VS mode if it's under AI control. This troper pounced someone as a Hunter, only for an AI Tank to smash me off the survivor and wound up killing me just because it wanted the same victim I had. Frustrating, but also somewhat funny.
      • That phenomenon seems to be the primary reason that the game doesn't just end once everyone is constricted/pounced/incapacitated: this troper has occasionally seen the last Survivor get pounced and assumed the game to be over, then watched a Tank smack the Hunter off them and the Survivor somehow get themselves out of there and win.
  • Dressed To Kill: Nick's wearing a suit in the Zombie Apocalypse, which he claims cost him $3000. Then again, he is a con man.
  • Dumb Muscle: Francis to some degree, but with the recent Crash Course DLC, Louis and Zoey make it more obvious how uneducated Francis is (one of Francis' lines has him think they're in Canada!)
  • Dummied Out: Many voice clips from the survivors, such as them warning each other of nearby Boomer or Smoker (not spotting them, just hearing their presence and they always vocally announce of a Hunter being around the corner.), never play in the game, but the sound files for them are present in the game's folders.
    • They play all the time
  • Dungeon Bypass: Guarding the doors and windows is all well and good, but sometimes the horde just crashes through a wall.
  • Elevator Action Sequence: Not on the elevator itself, but on the fourth level of the first campaign requires holding off the horde while waiting for the elevator.
  • Elite Mooks: The sequel will have new normal zombie types with specific effects. For instance, zombies in Hazmat gear are immune to fire, whilst the "Mudmen" will blur the vision of the people they hit, and zombies who were infected wearing riot gear are immune to regular bullets from the front. And in the Dark Carnival level, you will be facing zombie clowns...
  • Enemy Summoner: The Boomer.
    • Valve has also stated that the new Zombie Clown UCI will be able to do this also.
  • Epileptic Trees: Nothing about the origin of the Infected is explained, leaving players to come up with absolutely every theory under the sun. Even off-screen supporting cast within the game itself fall afoul of this trope as they bicker among themselves on the various wall scribblings, etc.
  • Everybody's Dead Dave: The only non-zombies you hear from in the game are the four survivors, the Church Guy (who quickly turns into a zombie), and the people that rescue you at the end of the campaign. There's hints left behind of other survivors that have passed by before (including the graffiti on the safe house walls), but you never see them.
    • And then there was that one guy (also presumably immune) who went down the path you follow through the Dead Air campaign, spray painting GOD IS DEAD everywhere. You find his body inside the airport, a pistol and spray can next to him — presumably he shot himself.
    • There is a woman you find who had been spraypainting about barricading the supermarket. When you get in, it's secure, but it's obvious she died fighting off a horde just outside of the safehouse.
    • Slight aversion: You can hear ongoing firefights while traversing the urban environments. They might not be alive much longer, but there might still be other immune survivors out there.
  • Exploding Barrels: Come in three flavors, propane tanks that explode when shot at, oxygen tanks that leak before exploding when shot at, and gas tanks that burst into flame when shot.
  • Expy: Zoey looks a lot like Claire Redfield.
    • Louis acts a lot like Jim Chapman.
    • Francis looks like Johnny Klebitz' from Grand Theft Auto 4.
    • It's even more apparent if you've ever seen Resident Evil: Degeneration. If Claire had Zoey's girl-next-door personality and her geeky knowledge of zombie movies, Claire and Zoey would be indistinguishable.
    • Coach from Left 4 Dead 2 (the big black guy) has been frequently compared to Uncle Phil. Really.
    • Speaking of the upcoming sequel, what is The Scout doing over there?
    • And Nick from the sequel looks nearly like Finn from The Club.
  • Film Posters: One for each campaign. You can see them here.
  • Five Token Band: Well, four tokens, but there's a wide array of ages — if not ethnicities — presented here.
  • Foregone Conclusion: the poster for the Survival Mode-only level, The Last Stand.
    It Doesn't End Well.
  • Fragile Speedster: The Hunter can be bowled over with a single shotgun blast, and takes forever to slay a pinned survivor, but moves like a ninja on speed. Unsurprisingly, it's regarded as the hardest infected to play but also the most fun.
  • Game Breaker: Corner camping. Have all survivors cram up in a corner of a wall or a small room and constantly melee the infected rushing in or shoot all at once. Aside from a Tank, nothing can break through this formation. This is so common that most infected players in VS mode wait it out until the survivor players move again and both teams will corner camp when it's their turn as survivors. The sequel introduces the Spitter, which addresses this problem by hurling heavy damaging acid on the floor, and the Charger, which knocks down survivors in its path.
  • Game Mod: A soundpack one that changes all the sounds of the infected to Macho Man Randy Savage quotes. Hilarity Ensues.
    • Tourettes Shitcock Syndrome: There's also a Tourette's Guy soundpack for the Tank. Watch it here. Also qualifies as a Crowning Moment Of Funny.
    • This Troper found that clip to be Nightmare Fuel. He watched it yesterday and had nightmares of a horde of zombie Randy Savages chasing him all night. Thanks, guys.
      • I thought you were a wuss. Then I watched the video. I will be very lucky if I get to sleep tonight without hearing "Yeah! Yeah! Yeahyeahyeahyeah-"
      • (bang) (bang) (CRASH) "SNAP INTO A SLIM JIM!"
    • And there's another that replaces all playable infected with the survivors, amusingly.
    • On top of that, one can also replace the Tank's sounds with those of the Heavy from Team Fortress 2. Hilarity ensues as the Tank taunts the survivors ("Who send all these babies to fight?!") berates the team for killing it ("Little, little man!"), runs around grunting and talking to its 'Sandvich', loudly exclaims that it is on fire when it is indeed on fire, and even calls for a medic when taking lots of damage from survivors. Sadly, the sound pack was pulled from some sites and cannot be found easily.
    • Scout zombies, that is all.
    • Some people have gone so far to change the Tank's music as well, like turning it into "Can Can", Benny Hill, and even Final Destination!
    • Also, Johnny Bravo Tank.
    • Nude Zoey.
    • BILLYMAYS Tank.
    • YEAAAH!
    • Pee-Wee Herman Infected. Can you say Nightmare Fuel?
    • If you think all the sound swapping is hilarious, try playing servers that allow up to eight survivors in the game. That's right, you'll have multiples of the same characters running around and you will go WTF when you see messages like "Zoey saved Zoey." Even Expert becomes a bit easier with 8 people's worth of firepower running around.
    • This troper found a campaign mod, about halfway finished. It's content? Silent Hill. Yes, it is as awesome as it sounds. I hope you remember precisely where to go in the first game, because you're going to need those "keys to Eclipse."
      • In fact, there is literally a game mod for each Resident Evil game, excluding Five, Code: Veronica, and Dead Aim.
      • Not to mention Dead before Dawn.
    • Teletubbies. Now you can be as afraid of them as Jerry Falwell.
      • That is a whole new level of terrifying I have never even contemplated before.
    • Then we get to see what happens when Louis gets his pills. First for shit n' giggles but became, in this troper's opinion, Highoctanenightmarefuel.
    • This game + soundtrack from 28 Days/Weeks = Pure terror.
    • Left 4 Dead 2 is already getting mods as well, despite only the demo being released as of now. Such mods include ''Don't Stop Me Now'' as a Jukebox song.
  • Gameplay And Story Segregation: beautifully averted in the opening cutscene. Furthermore the opening sequence shows off almost every gameplay element, so its like a tutorial.
    • Partialy averted. In-game the writing on the walls suggests the saferoom has been in use for a few months (October to December) with our survivors always being the last pickup at a given area. The intro movie shows them getting onto the roof for the begining of the first scenario two weeksafter the first infection. Either gameplay split away right there or the survivors waited on that apartment roof for two and a half months without starving to death before trying to evac.
      • Who said they stayed there the whole time? It's more than possible they made some quick runs down to the street for supplies. The intro could have been them returning to their makeshift base after a quick food run (they probably only brought what the could fit in their pockets since they needed to stay armed) since they clearly knew it was safe on the roof.
      • As it happens, No Mercy doesn't mention dates at all. Given the campaigns happen in isolation, it's entirely possible No Mercy (and the intro) takes place a couple weeks after first infection while the others take place in the time after that.
  • Gatling Good: You get the odd mounted minigun here and there. It's set up so that the gunner will have to be covered by the other Survivors, though.
  • Genre Savvy: Zoey, who, as before, wasted most of her time watching zombie movies, who at one point calls "zombie bullshit" on them being able to run so fast.
    • Often memorably averted by the players themselves. You know those stupid things you yell at people in a zombie movie for doing? Odds are you'll do at least one of them, and only realize it afterwards.
    • The CEDA are quite genre savvy in the sequel, pulling their main operations back to where zombies can't get at them, establishing some very thorough checkpoints to 'screen' possible infectees and so forth. Unfortunately a number of their outposts seem to have been overwhelmed regardless.
  • Glass Cannon: As mentioned above, the Hunter is fast and fragile, but a perfectly timed pounce can knock off up to a quarter of a survivor's health before they even see it coming. The Boomer is even more fragile, but a skillful player can do even more to hinder the Survivors than with the Hunter.
  • Goddamned Bats: The common infected.
    • Especially if there's a Tank; the common ones will not let you move out of the way.
  • Good Bad Bugs: The game is almost filled with various glitches and exploits that make the campaigns almost laughably easy but can be a life saver on Expert difficulty. Most of these were patched for VS and Survival modes to keep the balance.
  • Goomba Stomp: Stepping on a zombie's head from above will kill them instantly and may possibly break your fall. Special infected are immune to head stomps and will, in fact, Goomba Stomp you if they fall on your head while you're on a ladder  *.
  • Gorn: The new damage modelling in Left 4 Dead 2 borders this, if not outright landing inside it. Nothing bad about it per se, but seeing exposed spines, internal organs, etc, after playing the first game is rather surprising, or, in the case of zombies running at you while their bowels slowly roll out to the ground trailing a straight line, Bloody Hilarious.
  • Gravity Barrier: keeps you away from a zombie breeding ground and to keep you moving along to your safehouse.
  • Griefer: Online is filled to the brim with them, whether you have people do team killings, steal and waste items, or do anything else to slow down your progress. This troper unfortunately was in a team where someone convinced the others to change the difficulty to expert, then he promptly shot everyone.
    • Mitigated by the fact that players can call a vote to kick another player. This can backfire if the vote fails and someone calls a vote against you.
      • I find that it might be fun that if, before kicking the team-killer, you use the console commands to make, I don't know, lets say, 50 tanks spawn in front of him. That is, if he's dumb enough to stay after killing everyone on his team.
      • Only applies if the server allows the console command to be used or if the game is on a local server.
      • Meh, you could still just kick him without sending Tanks at him. Then again, I've only been griefed once in a completely different game, so I probably shouldn't talk.
      • And the funny thing is Valve knew about griefing through the playtesters when one would push another off a rooftop in the first map of No Mercy, which prompted Valve to add a small wall on the roof and disabled pushing between survivors. Naturally, there's a billion other ways people grief Valve didn't catch on or patch.
      • Just as nothing is foolproof to a sufficiently determined fool, so nothing is grief-proof to a sufficiently determined git.
      • The Survivor AI seems to be a natural at griefing human players. They either get stuck (temporarily), attempt to heal a player when they are on the move from zombies, toss a player pain pills while they are in a gun fight so the player may accidentally swallow the pills, run in front of the player as they are firing, and generally just ignore the player as they are being attacked by Smokers or Hunters. While Valve has claimed that the AI has improved for the sequel, so far in the demo, it only applies to the special infected and not the survivors.
  • Groin Attack: A One Hit Kill on normal zombies, even with the pistol. Try it, it's fun. Though a shattered pelvis does tend to make walking rather difficult.
  • Guns Akimbo: All characters can find and dual wield a second pistol for extra ammunition in the magazines.
    • There is even an achievement called Akimbo Assassin. You can unlock it by using the dual pistols as your only weapons in a story campaign.
    • You can still use molotovs and pipe-bombs, but not the mini-guns.
  • Harder Than Hard: Expert mode is Exactly What It Says On The Tin. Only experts can expect to survive. This doesn't deter people who should be playing Normal from playing only this mode, however, to the eternal vexation of anyone who wants to actually finish a level with all of their limbs still attached. The same applies for Advanced mode if the people you are playing with are still good, but not great at being zombie killing machines.
    • As an example: Normal mode causes Horde attacks to take off 1 or 2 percent of your life. Advanced, you lose 5. Expert? 10(from behind) to 20(from the front). And the only thing that generally changes between the difficulties is generally the damage the Infected do.
    • And the Friendly Fire damage. In Easy, you are practically immune to this. In Expert, it does much more damage than the zombies.
      • To clarify, on Expert, you deal full damage to allies, who have 100 HP, which is the same amount of HP that the regular infected you slaughter with wild abandon have. The basic Shotgun does up to 240 damage.
    • Expert also reprograms the Director, resulting in much more difficult situations and a genuine desire of a number of players to absolutely not linger in any given area (for those not in the know, staying in one area too long will make the Director angry, and he'll prod you to keep moving with zombie hordes, Hunters, Smokers and Boomers. On Easy, Normal and Advanced, you have some time to look in rooms for extra stuff, and backtrack if you think you missed something. On Expert, if you don't keep moving, you'll be overwhelmed very quickly).
      • The director on Expert simply loves to spawn special infected at a high rate and at the level's start. This troper and his friends were pinned down in the beginning of the 4th level in Death Toll for hours because the director would either spawn a Tank after we got to the street from the church or it would spawn a little further down if we got farther. If we killed some special infected and got a horde a few minutes later, MORE special infected would spawn with them. It became so bad that our team had to lower the difficulty to Advanced just to be able to go beyond the church. When we finally finished, it was shown that we restarted 11 times and took over 3 hours to finish
      • Radioactive Zombie watched a man go through No Mercy on Expert without managing to die. When hordes are killed, it seems there'd be a minutes pause, but a Special Infected would be with the next horde. Boomers, very usually.
    • Accidentally confirmed for Left 4 Dead 2 is Realistic mode. While not much is known about it, Valve has said it is supposed to be EVEN harder then Expert.
      • Basically Realistic Mode removes all the auras around characters being attacked by special infected, make zombies take less damage when shot anywhere except the head, and likely a few other things. Its also been rumored that it can ALSO be set to Expert mode, have fun.
  • Hes Just Hiding: Literally. Whenever one of the guys die, they're found later trapped in locked closets somehow. These closets serve as respawn points for player characters.
    • According to the Developer Commentary, this is supposed to emulate the way other survivors would inevitably hook up with the main characters in an actual Zombie Apocalypse movie.
    • To add to this, if a character(s) dies along the way and the others reach the safe house, any dead characters will appear with everyone else in the safe house in the next chapter.
    • Also averted in the final chapter of each campaign after the rescue vehicle has been summoned, any character killed during the setpiece finale stays dead (replacing "You'll be rescued soon" with "But your friends can still escape"). When the credits roll after any or all of the (live) survivors escape, instead of saying "the survivors escaped" it says "in memory of [dead players' names]"
  • Hey Its That Voice: Most of the NPC Survivors are played by guys who also did voices for Team Fortress 2.
  • Hide Your Children: The Infected are invariably adults.
    • Except possibly the Witch, but she's adolescent at best.
      • Have you ever looked at the witch's face? She's at least 30!
      • Thanks to the mutations, no doubt—hence the name "The Witch", as it makes her look like a hag.
  • High Octane Nightmare Fuel: Many of the special infected, but especially the Spitter.
    • Not to mention this newbie Special: The Jockey
    • Someone on the net has made an hypothesis: the extra biological matter that composes the Witch's claws comes from her unborn child, killed by the virus. This Troper, after reading about it, had to sit down and try to calm himself.
      • Well. This troper was just about to chow down on a nice, juicy burger, but now the thought of the witch's claws being composed of fetus have chased away any bit of appetite he might have had. Thanks so very much.
      • Me, being a desensitized person who thinks staring at Harlequin babies is somewhat humorous, thinks that hypothesis is fucking retarded. First off, the baby would have been completely rejected and expelled. Even if it had been absorbed, I doubt the bone is magically going to form sharp-ass claws.
  • Hoist By His Own Petard: The sequel features the "bile bomb," which allows the survivors to replicate the results of Boomer vomit, which causes a horde to target a splashed infected. Until your teammate freaks out and throws a pipe bomb, anyway.
  • Hold The Line: A number of situations (such as turning on the power to open up a route or summoning the rescue vehicle in the final level of a campaign) summons several waves of zombies while the survivors have to hold out for a set amount of time until the route opens. The survivors are generally provided with health assets, additional weapons and ammo, choice of grenades, and a (generally completely useless) minigun in some situations to help fend off the horde.
    • The minigun is only useless if the other players aren't watching the back of the person manning it. Effective team play makes it awesome.
    • The sequel changes this up a bit; many events now require you to start an event, run through an area, and stop it somewhere else.
  • The Hyena: The Jockey's main "weakness" is that you can hear his constant, crazed laughter from a mile away, effectively killing any element of stealth he may have had.
  • Idle Animation: The infected alternate between facing the wall, barfing up their guts and killing one another. The survivors alternate between stretching, wiping their faces, or picking their noses.
  • Incredibly Lame Pun: Although the characters themselves rather like it.
Francis: Hey Zoey, we're PASSING GAS
Zoey: Hahaha, farting.
  • And the new survivors are looking to continue the tradition. "Axe me a question" indeed.
  • And crash course gives us this little number:
Francis: Guys! Watch out for the Steam!
Zoey: *sensual groan* Ooh I love Steam!
Francis: Yeah, Steam's okay I guess.
  • Incredibly Obvious Bomb: The pipe bomb is one, but with good reason - its red light and high-pitched squeal attracts the standard Mook zombies, making throwing them less of a matter of where to, but a matter of when to.
  • Interface Screw: If the Boomer throws up or explodes on a character, their field of view goes blurry and green and in the third person for several seconds, making it hard to defend themselves from the Horde that the bile summons. Also, music priority switches to Boomercide, meaning that a particularly skilled team can temporarily mask the sound of an incoming Tank...
    • Boomer Bilevision also removes the "pinned-survivor" alert and that pinned player's red outline that shows up when a survivor is downed.
    • The screen also turns to black and white if your character is downed 3 times (the next knock down kills them). This can make spotting some items a bit difficult extremely easy as items retain their colored glow on a black and white screen. The colorless vision is also accompanied by a heartbeat, which can add to the tension if you lack first aid.
  • Invisible Wall: Only the Infected in Versus mode will run into them, and if you get close enough they stop being invisible... instead they become labeled "wrong way!".
  • Its Always Mardi Gras In New Orleans: Left 4 Dead 2 will partially take place in The Big Easy during the "Louisiana Festival."
  • It's Short, So It Sucks: The common cry of people who manage to blow through a round very quickly (40 minutes is fast for 5 maps while 1 hour is the average time). The short so it sucks complaint has become much louder with the new Crash Course campaign because it's only two maps long and it suited for a quicker VS game. The complaints for Crash Course being short rose up, despite the fact that most people already knew how short it would be months ago.
  • It's Quiet... Too Quiet: Because of the way the Director AI is programmed, Hunters, Boomers and Smokers will not spawn if there's a tank in the vicinity, and same goes for the random Hordes (the ones from scripted events still spawn, though).
  • Katanas Are Just Better - Left 4 Dead 2 will feature a katana amongst the melee weapons. Cue fangasms.
    • Averted in that the katana won't be any better than, say, a frying pan or a cricket bat. All the melee weapons are one-hit-kills against normal infected.
      • It's unknown if this will be averted or not...Valve has assured us that the melee weapons in the game will have differing properties re: draw speed, area of effect, etc. The L4D wiki claims the katana will have the widest effect range of any melee weapon in the game.
  • Killer Game Master: The AI director. Particularly on Expert mode, when he stops even pretending he doesn't hate your guts.
    • AI Is A Crapshoot: Is it just me, or has the Director become even more hateful recently?
  • Kill It With Fire: There are Molotov cocktails in the game. Cue screeching.
    • Left 4 Dead 2 will feature incendiary bullets. However, certain zombies are now fireproof (they wear hazmat suits).
  • Leeroy Jenkins: When someone on your team insists they can take on a Witch (they don't ask, they just do it or excitedly say "Ohh let me take her!"), just sit back and enjoy the show.
    • Tanks are also common targets for Leeroy Jenkinism.
  • Le Parkour: Players who are skilled at the Hunter can navigate walls and rooftops with ricocheting jumps.
  • Lighthouse Point: The Last Stand.
  • Lightning Bruiser: The Charger, along with the Witch and Tank, although to a lesser extent.
  • Love It Or Hate It: "refreshingly straight forward, or short and repetitive with zero narrative"
  • Luck Based Mission: Depending on where enemies spawn and what types they are, you can either have a smooth sailing game or a nightmare of just trying to survive.
    • VS is also the same where sometimes the infected spawn at bad spots in the finale or the Tank spawns while it's on fire or stuck in a window. At other times all it can take is one tank to wipe out the survivors. Of course one bad team can cut down on the luck factor.
  • Ludicrous Gibs - Combined with Pink Mist - a pipe bomb will turn the zombies right on top of it into unidentifiable pieces of meat, but mostly a blood fog.
    • The sequel ups the ante; rather than simply causing them to disintegrate, a well-placed pipe bomb will send dozens of zombie limbs flying in all directions, littering the area with blown-in-half corpses.
  • Made Of Iron: The Tank, The Witch less so, but still counts. The Survivors come close, too.
    • Pain pills can also provide a temporary health boost to the survivors, who can therefore demonstrate some Made Of Iron-ness.
  • Made Of Explodium: The Boomer's death causes him to go off like a frag grenade. Don't stand too close, you dolts!
    • It also shares one of Halo 1's grenade explosion effects.
    • Close to the beginning of the third level on the first campaign, the survivors can blow up a gas station, potentially killing everything around...including themselves, if they're not careful.
      • The developers originally was going to have the Boomer be just like walking grenade, which would have caused instant death or massive damage to the survivors if shot too close. Thankfully, Valve opted to make the exploding Boomer just cover you in bile.
  • Made Of Plasticine: It's not uncommon for the basic infected to be graphically dismembered by a shotgun blast, a few stray bullets, or being bashed with a rifle butt.
  • Magical Defibrillator: Capable of bringing players back from the dead in the sequel.
  • Memetic Badass: A number of forums have taken a single graffito referencing a "Chicago Ted" (itself a Shout Out to an old gaming website) and seem to be attempting to turn him into a Chuck Norris-esque zombie slayer.
    • The wiki has him hammering a Tank from behind, a la Resident Evil 3, barefisted and barechested, allowing survivors to escape in a car. Not just hammering on it, but riding it like a horse while beating it in the face with a baseball bat with a nail in. Badass.
  • Memetic Mutation: "I hate hospitals." "I hate stairs." "I hate forests." "I hate small towns." "I hate lawyers." "I hate tunnels." "I hate vans." "I hate train yards."
    • "I hate Ayn Rand."
      • And adding to the almost endless list is the fanmade Map, Dead before Dawn is, predictably, "I hate malls".
    • From the new DLC: "I hate Canada."
    • "I miss the internet."
      • It should be noted that this line is unrelated to Francis' seemingly never-ending list of hated items, vests being the exception. It is, in fact, graffiti found on a safe room wall underneath a back-and-forth argument reminiscent of petty internet squabbles. With Crash Course now released, Francis now hates helicopters, flying, walking, sometimes steam, and birds. A lampshade is hung over when Zoey says "Hey, Francis! They have the latest issue of I Hate Everything!" and Francis quips back with "I hate latest issues."
      • So is Francis by any chance related to movie Bonecrusher, who also hates everything (and whose hatred is also a meme itself)?
    • "Grabbin' Peelz!"
      • Oh god, the best 12 seconds you'll ever listen to.
    • RAGE QUIT! Though this is spewed over anyone leaving over for ANY reason, even if there is no raging involved. Some people are now also shouting RAGE KICK over people who are too kick happy in forcing people to leave.
    • New to Left 4 Dead 2, 1. bind <key> "vocalize useadrenaline" 2. Play as Ellis. 3. Press that key over and over. 4. ??? 5. WUBUBUBUBUBU
  • Message Board: Saferoom graffiti really acts like this, although people who leave the saferoom probably don't return. Ever.
  • Mighty Glacier: The Tank is only RELATIVELY slow in the sense that it moves slower than the survivors. It is, however, far and away both the toughest thing in the game and the most dangerous.
    • Unless you're injured, in which case there is little fundamental difference between being injured and being dead.
      • Also, in enclosed spaces, most survivors will shoot the tanks while running backwards. This makes it easy for them to get caught up on the scenery; and then they lose the speed advantage.
  • Mission Pack Sequel: Left 4 Dead 2, which was based on development that was originally supposed to be free download content for L4D1. Created an Internet Backdraft of unbelievable size.
  • Molotov Cocktail: Lovely, lovely, molotov cocktails...
  • Monster Clown: Left 4 Dead 2 will feature zombie clowns.
  • Musical Spoiler: Musical warning is given for when a horde appears, a tank appears, or when a witch is nearby. It also plays softly whenever any special infected are nearby, making those who know each one's theme music able to know one's nearby even without hearing them or seeing them.
    • It's true. This Troper in specific is nearly always put on spot for his knack for hearing the Tank before it can rampage, giving the team a vital chance to prepare before alerting it to their presence. And besides, without the cues, they'd practically be appearing from nowhere; it would work with the Hunter and Smoker, but imagine it with the Boomer...
    • Perhaps most impressive is the fact that each player hears different music, so that one might know a Horde is coming from the cue, but the other players, who might be off in another room, have no idea. When you die and you're following another player's view, you get to hear the music they hear, which changes when you switch to another player.
      • Although, if anyone gets vomited on, the music immediately switches for everyone, regardless of where they are. Same thing when someone disturbs the witch.
      • There can also be subtitle spoilers if you have full captions on since the feature will always alert you to any special infected or incoming hordes before you even see or hear them. This can be useful if you are playing the game without sound or just want to always be on alert, but if you want suspense and tension, then the subtitles should be off.
    • This troper plays it with the volume turned off, as he usually likes to listen to his music while playing. He finds it easier to cr0wn Witches that way.
  • Most Annoying Sound - Step 1: Bind a vocalization to it's own key. Step 2: Press this key repeatedly. Step 3: BOOMER BOOMER BOO-BOOM-B-B-BOOMER
    • If done online, most players will be quite eager to kick you off the team. With bullets.
  • Mythology Gag: Bill, during early development, shared his last name with Half Life's Barney Calhoun.
  • Narm: This troper laughs every time he hears Bill's overly dramatic exclamation of "Ohhhh noooooo!". He's not even sure why, it just sounds comically over-the-top.
    • Any time one of the team dies (outside of a major battle), one of the characters, usually Zoey, launches into a short speech.
      Zoey: (calmly; mid-battle) "It's not going to get any better, you know."
      • Louis: "Shit. Shit! Shit! Shit! SHIT!!"
      • The best is when they see the body of a dead Survivor, and then his weapon. "Oh god, not Fr-HEY, WEAPONS HERE!"
    • It's better when they interrupt the speeches. "I'm gonna miss that son of a PILLS HERE!"
      Zoey: Do you think it's ever... gonna go back to normal?
      Bill: (attempting to heal himself) I'll see peace back on earth if I (healing done, speech will now give way to suspiciously relaxed-sounding sigh)
      (two seconds of silence)
      Louis: That's what I'm talkin' about!
    • For some reason, Francis's screams while incapacitated sound hilarious to me. They remind me of Goofy.
      • That's because Francis screams like a bitch. So much for being the tough guy...
    • The way Francis yells "Hunter on (whoever)!" when one of his teammates gets pinned is rather more "Dude, totally hot!" than "Oh, no!"
    • ...what? No mention of Louis' scream as he falls off a ledge? Used here to comedic effect.
  • Nakama: Listen to any one of the survivor's speeches after a comrade has been downed and tell me you don't get this vibe. Then of course there is this...
    Louis: "Mister, if one of us dies out here, I will shoot my way in there and beat you to death with my gun!"
  • Never Live It Down: In Crash Course, Francis will not let Zoey forget about shooting the zombie helicopter pilot. Granted, it was at the beginning of the campaign, so it's justifiable.
    Francis: They're comin'! Zoey, pretend they're all helicopter pilots!
    Zoey: Zombies, Francis. He. Was. A. Zombie.
  • Never Split The Party: Seriously. Even on the easiest difficulty setting, if you split up you die - the game actively spawns a Hunter or a Smoker on you, which is inescapable if you don't have a party member to kill it with.
    • Skilled players who spot them first can escape harm. However, attempting this is generally not recommended.
      • Even if the lone player doesn't get attacked, the other players will yell at the runner for leaving them behind as they get slaughtered.
  • Nerf: In the original, players could "shiva stack" (wait in a corner or secluded room, all bunched up and repeatedly melee). This made it nigh-on impossible to extricate them with anything other than a tank. The sequel is going to make stacking less useful with new zombie types (such as the Charger, and recently announced Spitter).
    • Players in certain areas, like the No Mercy finale, could hide in a closet and bottleneck an area as zombies flooded in, posing only a threat to Smokers, Tanks, and Witches. The new Special Infected in L4D2 can ruin all this, with a little help from the upgraded Director.
  • Next Sunday AD: The death notices in the church state that the game is set a few months in the future. Value updates them every so often to keep the dates in this trope.
  • Night Of The Living Mooks: The game pretty much shuffles the Horde's character models at random.
  • No Animals Were Harmed: parodied, "X zombies were harmed in the making of this film." (Where X is the number of zombies killed during the campaign, which is usually at least one thousand zombies)
  • Non Sequitur Thud: One of the the openings of Crash Course has Francis talk about how much he loves helicopters, until Zoey reminds of his well-known trait of hating everything.
    • More germanely, Bill will occasionally stutter "Wha — who are you?!" as another Survivor helps him up.
  • Noodle Incident: Ellis brings up quite a few of these in-game before being told that telling these during a zombie apocalypse might not be the best idea.
  • Not Using The Z Word: Averted: During a quiet moment, Francis will occasionally complain about "the vampires" and Bill will correct him: "They're zombies, Francis."
    • "Call these freaks whatever you want!"
    • Mocked in one of the Safehouse graffiti notes. "Move during the day they only come out at night THATS VAMPIRE'S[sic], MORON!!"
      • Thanks to the sequel, we know that moving during the day may be more dangerous. Witches are active during the day, crying and sobbing and slashing anything that gets in their path (but may be less easy to provoke, with hands shoved in her face)
      • And let's not forget that Zoey calls "Zombie bullshit" on the game's antagonists (and their level of speed).
      • Also, Louis comments on Riverton, "If you ignore the crazy guy and the zombies, nice town."
  • Offscreen Teleportation: How the Infected spawn in during a Versus game.
    • AI controlled characters can teleport as well, probably a feature programmed in to make sure they couldn't get in the way of players and block them in room or corner, and also to hurrily save a player if there is a very far trek ahead for the bot. However, on some occasions they can even teleport when the player is looking right at them.
  • One Hit Kill: The Witch's first strike.
    • Which is actually only a one-hit-kill on Expert difficulty. Otherwise it's just an incapacitation.
    • Falling off a building is instant death, whether dragged off by a Smoker or hurled to your doom by a Tank. Very frustrating.
      • It gets ridiculous when you're glitched into it, and it's a three foot drop.
    • Melee weapons and Desert Eagle dish those out in the sequel to ordinary infected.
  • Our Zombies Are Different: The Infected are not really undead, but rather, very, very sick people who have been severely taken over by the virus. As such, they have been programmed only to spread the infection and then die.
    • Not to mention that the zombies don't even bite you. Instead, they will punch, kick, and claw the crap out of you.
    • As this Troper mentioned above, this is mocked when Zoey claims that zombies "aren't allowed to be that fast."
  • Out Of Focus: Unlike the other three survivors, Bill didn't get any new lines of dialogue in Crash Course. If the player is paying careful attention, hoping to hear new dialogue, Bill's silence is noticeable.
  • The Power Of Friendship: Literally. Nothing will get you killed faster than leaving your fellow survivors behind and trying to Rambo your way through the next level alone.
  • Painting The Fourth Wall: The ending to the Dark Carnival has you activate the stage effects for a band that was originally going to play. The next two Tank cues then have a very distinct rock feel to them over the original orchestral.
  • Rage Quit
  • Real Is Brown: The first game was pretty dark and grey. The second will be brighter and more colourful. Presumably someone somewhere is crying some more about it.
  • Respawning Enemies: Both the Director and boomer bile have the tendency to summon fresh hordes of zombies from previously cleared rooms with no obvious point of entry.
    • This troper has seen a horde of roughly thirty zombies spawn from a bathroom that would be cramped with one-tenth of that amount within its walls.
      • Well, in one playtrough, this troper saw a tank come out from a pipe in the sewers of the first campaing(don't remember that level, though). All my friends there where with me at this time would just "what the fuck was that?". To clarify, we saw him appear when he was INSIDE THE PIPE and to boot, it's big enough to just show his head and about a third of his shoulder.
      • And this troper has seen that same amount burst out of a small air vent.
      • This troper had a rather large horde spawn in a storage unit AFTER clearing the enemies inside.
      • This troper once had a Smoker spawn right on top of him in the sewers in No Mercy, preventing him from moving until an ally killed it. If it were any other game I'd have died right then.
      • This troper has not only been in a generator room and had a horde appear from a corner behind a generator that was clear and had no access point from which they could have gotten into the area from, but also had a horde appear right behind her in a clear room, when she had just turned from that direction and a friend was facing the direction they appeared in as well.
      • This troper once, while playing a custom campaign, saw 20 zombies spawn out of a bathroom stall that could barely fit one person in it.
      • This troper had a horde spawn right in front of him at the end of a very short pitch black hall way... having a horde rush out of the darkness like that was not good for the pants.
    • If the rules in Versus are any indication, the only rules the AI director has for spawning things is having enough space without getting stuck and lack of line of sight to any survivor. So even something as minor as crouching on top of a truck or hiding behind the smoke cloud of a smoker can or is enough to allow special infected to spawn in.
  • Replacement Scrappy: The cast of Left 4 Dead 2 according to the boycott group, after seeing the E3 trailer and reading small tidbits about them.
  • Rule Thirty Four - Yes, Left 4 Dead has porn. Now, if you'll excuse me, I'm going to find something dull and rusty to gouge my eyes out with...
  • Screams Like A Little Girl: Francis to some degree. When he is being attacked while incapacitated, he will sometimes scream in a higher pitched and silly voice.
  • Scripted Event: Possibly the most awesome one ever, on the runway—a 747 crashes right next to you, erupting in a massive fireball.
  • Serious Business: Handfuls of people take the game very seriously and will scream at you or call a vote to get you booted if you do anything they don't like (not the Too Dumb Too Live type player mind you). More noticeable in VS mode where people will yell at you for not saving them from the infected quick enough and/or yell at you if you don't do enough damage to survivors or just plain outright miss your attacks.
  • Set A Mook To Kill A Mook: The result of a zombie being hit by a Bile Bomb, including the Special Infected.
  • Shipping - Some people make a very big deal about who Zoey is placed next to on the various official campaign posters...and now it's starting with Rochelle as well.
    • There's quite a bit of fanfic out there that ships Zoey with the Hunter or the Witch as well. Yeah, I'm creeped out too.
  • Shout Out - Well, if Louis' clothing change from a sweater and combat gear to a white dress shirt and a red tie doesn't clue you in...
    • *Ahem*
      • Doubtful. Shaun is at least thematically related; you'd need a tie with red and black stripes for yours.
    • Some of the graffiti (and one of the achievements) references the "Zombie Genocider" achievement of Dead Rising, which rewarded the player for killing 53,595 zombies.
      • Dead Rising's "Zombie Genocider" achievement was for killing 53,594 zombies, thus the Left 4 Dead achievement ("Zombie Genocidest") requires one more kill than Dead Rising. Take that, Dead Rising!
      • It appears that this has caught on; Prototype has a "Trail of Corpses" achievements, for killing 54,596 infected. Difference being that the Prototype Infected are explicitly 'not zombies.
      • Valve have introduced a new twist — the "Littlest Genocide" achievement, which requires you to kill 5,359 zombies on the Crash Course DLC campaign.
    • There are clues that the game takes place in Pennsylvania (the cars have license plates like Pennsylvania's, there is a Mercy Hospital in Pennsylvania, a Riverside, PA, the fourth campaign takes place in the Allegheny National Forest, and in Crash Course Zoey has a line telling Francis that they're in Pennsylvania). George Romero's movies were all set in Pennsylvania.
      • The commentary for No Mercy also says that the buildings were based on the Philadelphia skyline.
      • The game mostly appears to take place in the Pittsburgh area, however. I'm a college student there, Mercy Hospital is one of the U. Pittsburgh Medical Centers. Our street signs are blue like the ones in the game (Philadelphia street signs are green), Allegheny National Forest is near Pittsburgh, and from No Mercy it's clear the city is surrounded by mountains like Pittsburgh. The only thing that clearly is NOT based on Pittsburgh is the airport, which appears to be within the city limits, Pittsburgh International Airport is about half an hour out of the city (due to the mountains, there isn't much level ground to build an airport).
      • Also:
      • However, news vans marked "NBC 10" are seen in Chapter Four of Death Toll. NBC 10 is Philadelphia's NBC affiliate.
    • Not to mention the countless shoutouts to zombie movies, ranging from things Zoey says to a room where you can see the remains of a zombie killed by a lawn mower.
      • The messy lawnmower scene in Blood Harvest is a Shout Out to the zombie movie Braindead, which was directed by Peter Jackson.
      • When this troper first got to that part, there was a Witch RIGHT THERE, sitting in the middle of the mess, crying her eyes out. Aside from the obvious terror of knowing that the Witch was blocking any progress, the image of a half-naked zombie woman bawling over the meatball-sized chunks she was sitting in set a match to a tankful of nightmare fuel.
    • Aside from references to specific zombie movies, some which are mentioned above, the game itself is a homage to the entire zombie movie genre. Each campaign is presented as a movie, with a theatrical poster at the beginning and a credits sequence at the end. All in-game graphics are shown under a subtle film grain filter (the subtlety of which can be changed in the options menu, at least in the PC version), and musical cues are used to highlight certain situations. Various zombie movie tropes are referenced, lampshaded, played straight, or subverted (sometimes all four!). And of course, the placement of enemies and items being controlled by an AI Director.
    • And, of course, a most brilliant reference to a completely non-zombie movie: "He slimed me!"
      • And then there's the Hunter, who looks quite similar to the protagonists of the Assassin's Creed and Thief series and is very stealthy at times as well.
    • The Dead Air campaign features a Shout Out to Nietzsche. A man spray-painted "God Is Dead" (a phrase made famous by Nietzsche himself) on the walls at several points before he apparently killed himself.
    Zoey: "Oh no, the Zombies killed God!"
    Francis: "God's dead, huh? Well, join the damn club."
    • Upon picking up an SMG, Louis might say, "This is just like in Counter-Strike!"
    • "Game over, man! Game over!"
    • The escape vehicles in Crash Course are clearly modeled on the zombie-smashing buses from the Dawn Of The Dead remake.
    • If the chriterea is met, Zoey will say "Groovy."
    • Some of the scenery has remarkable similarities to movie scenes, such as the hospital storey that is still under construction or the luggage conveyor room.
    • Based on the new trailer released for Left 4 Dead 2, one scene shows Coach eating a chocolate bar and another scene has Nick make fun of Coach by trying to convince him to go up the stairs faster saying that the escape helicopter is made out of chocolate. This could be a possible reference to Doc Louis who also had a heavy preference to chocolate.
    • In the first map of The Parish, a jukebox can be played in the bar and has a few songs selected at random, one of them being Still Alive.
      • And by the same singer "Re: Your Brains."
  • Sinister Subway: The second level of No Mercy goes through a subway.
  • Sound Coded For Your Convenience: All the boss zombies make a distinctive noise when nearby (although not directional, unless if you have surround sound) boomers give off a grotesque bubbling noise, smokers hack and cough, hunters growl and give off a loud screech when pouncing, the tank pants when not moving and thumps around when moving and the witch cries. Additionally, every single boss (and other events, like a zombie swarm) has their own distinct musical cues (the Tank's especially, which continuously plays from the point it spawns notices the player until after it dies), to the point where it is possible to anticipate bosses up to a minute ahead of time by listening to the orchesteral score.
  • Squick: One theory suggests that what the smoker shoots at you isn't his tongue- it's his intestines...
    • Another theory suggests the same thing for the Boomer were the belly button would be.
    • Don't forget that theory concerning the Witch and her fetus claws!
  • Stop Having Fun Guys: Very noticeable in VS mode. Using the Hunting Rifle somehow makes you hinder the team, regardless of your skill, getting heavily damaged by the zombie players makes you a sucky player, and missing your attacks as a special infected also makes you the worst player ever. Unless you use the same guns they do and never screw up in a VS game, everyone will want you gone and they will vote you off if they really hate your "poor" skills.
  • Stupid Sexy Flanders: Ellis. Or So I Heard.
  • Super Drowning Skills: Any map that has a river in it in Left 4 Dead 2. Unlike the first game where being underwater too long would drain your health eventually, being submerged in the second game will instantly kill you.
  • Super Power Lottery: The special zombies, who randomly received super-powers to go along with their new hunger for flesh. Particularly the Tank... let's face it, if you must be a zombie, wouldn't you rather be a ten-foot tall killing machine that can withstand multiple shotgun blasts to the face and throw cars around one-handed?
    • Or Survivors off of tall rooftops, if the Director is feeling particularly assholish.
  • Tainted By The Preview: The complaints of the L4D2 boycotters mentioned above and below were all based on what little footage is there at E3 2009 (Some did say their boycotting of it was because Valve went back on their promising free updates to the first game which the sequel would inevitably have).
  • The Smurfette Principle: Zoey is the only playable woman in the first game; Rochelle is the only playable woman in the second.
  • The Tetris Effect: Play the game for a good hour or so. Close your eyes. See the zombie horde rushing towards you?
  • This Is Gonna Suck: The reaction of both the players and the characters anytime anything happens to draw the Horde. The moments that fit the trope most are those where you have to make a metric asston of noise to advance.
  • Token Minority: The sequel has two-out-of-four black characters instead of the one in the original: Coach and Rochelle. Rochelle is still makes the game follow The Smurfette Principle, though.
  • Too Dumb To Live: For the online co-op. If you have someone on the team who just keeps making dumb decisions, you'll shout this trope name. May also cross with a Leeroy Jenkins.
  • Took A Level In Jerkass - Francis snarks at Zoey and others throughout Crash Course.
    • And Louis to Francis during Crash Course as well on at least two occasions.
    Francis: Why are you still wearing that stupid tie? Got a meeting to go to? *laughs*
    Louis: That's funny, Francis. Why don't you take your moustash, your chaps, and your vest and go find yourself a parade?
    Francis: *Grumbles* I don't see what's wrong with vests...
    • In No Mercy:
    Bill: If I start to turn, shoot me.
    Francis: What if just your beard starts to turn? Can I shoot that?
  • Too Good To Last: The result of the L4D2 boycott group. While the founders of the group created the group with the intention of getting Valve to keep the support for the 1st L4D alive after the sequel was released and would boycott if they didn't do so by the 2nd game, many of the people that joined the group only done so for the sake of "boycotting" and not paying attention to what the founders were trying to do and they also joined the group to just troll Valve. On top of that, when the founders were invited by Valve to personally play test L4D2 and was told by Valve that they had more content planned after Crash Course, many of the group members called the leaders complete sellouts. While the group did get near 40,000 members and lasted for 5 months, all the constant bickering and trolling within the group became one of the major reasons why the founders decided to shut the group down.
  • Too Soon - A writer for the Houston Chronicle accused Valve of this for setting a game in ruined New Orleans.
  • Unpleasable Fanbase: It's a long story, trust us.
  • Video Game Cruelty Potential: There is just something so fun about jumping on top of a lone survivor as a Hunter, laughing in delight as you tear him or her apart, knowing they're completely and utterly helpless.
    • This epitomizes why Versus is so great. You know this morons you scream at for running off by themselves and getting killed because of their own stupidity? Now you can do the killing when they lag behind their team as you pounce as a Hunter or grab them as a Smoker.
      • Same for survivors who decide to rush ahead. Nothing spells cruelty and humiliation more than incapping and/or killing someone by the safe house.
  • Videogame Setpiece: Most prominently in the last stage of Dead Air, when the survivors leave the saferoom to see a plane on approach go out of control, impact the ground, and slide in on fire before exploding.
  • The Virus: If you're unlucky enough, you turn into a constantly crying, always-guilty Witch, an exploding fatass, get Gene Simmon's tongue, become an flying Parkour expert or turn into the Hulk.
  • Visual Pun: The boxart is a zombie's left hand holding up four fingers, with the thumb ripped off. Same thing in the game's intro.
    • This troper has also noticed the thumbless hand in the first floor of Mercy Hospital, in an X-ray in one of the side rooms.
      • Which is actually where they got the box art from (just listen to the commentary).
    • The box art for the sequel is the hand again, except it's only holding up two fingers.
      • Which makes this troper wonder if they're going to be able to use that cover art in the British Isles.
      • They've reversed the hand for the UK release so it's giving the "pease" sign
  • Wall Jump: The hunter can do this, with practice. In fact, this is the only way to get to certain places without using the noclip cheat.
  • We Cannot Go On Without You: If there are any bots on the team, you'll have to start the level over again if all the human players are dead, regardless of if there is a bot player alive. It becomes a Wall Banger when playing against a team of bot Survivors in versus mode and they are capable of moving through the level on their own without the guidance of a human player.
  • What The Hell Player: Shoot one of your fellow survivors, and they'll yell at you. Bill has the best example, actually using the trope name.
    Bill: "What the hell are you doing, Francis?" "Secure that weapon!" "God damn it, watch your fire!"
    Francis: "Nice shot, Louis; that was my ass!" "Watch where the hell you're shooting!" "You do that again, you're gonna be firing that thing out your ass..." "Stop — shooting — me."
    Louis: "Whoa! Hey! Don't shoot, it's me!" "I'm gonna shoot you back next time..." "DO I LOOK LIKE ONE OF THEM?!"
    Zoey: "Ow! That's not funny!" "Why would you do that to me?" "Aagh! Damn it, Bill!"
  • Whoring: Players could get minimal damage from hordes and the Hunters by constantly spamming the melee attack button, which created problems for VS mode. Valve have made a Nerf for it where melee attacks now require a quick cool down before being used again. Luckily, this does not apply to the co-op mode. Aside from that the only way to break through melee whores was with a Tank.
    • The sequel is addressing this with a new boss type, the Charger, who's purpose is to knock over anybody not smart enough to get out of it's way.
      • Also recently announced is the Spitter, who can spit area denial acid which causes severe damage.
  • The Woobie: This troper feels sorry for the Witch (who spends her time crying) and will get rather vocal if another player intentionally disturbs her. This troper hopes he isn't alone in his sympathy.
    • Plus, after she kills someone, she looks horrified and runs away. Of course, it is kind of hard to feel sorry for someone who's just killed you... Plus she can be a bit of a gamebreaker at the wrong angles, like just on top of a stair.
      • Or right behind you as you climb up through a manhole cover. This troper is still glad the Director conjured up a couple Molotovs nearby to chuck up the hole at her to flush her out. That would have been very painful otherwise.
    • That troper isn't alone, as this troper is also sympathetic towards the Witch. Her "story" (or, to be accurate, the speculation of it) is easily the most intriguing of the boss zombies.
    • Sadness. I'll just leave this here.
    • Although I initially felt sorry for the Witch, her incessant crying became really annoying after a while (just like someone else's kid in a public place), especially on levels where the route wraps around where she is, and you have to listen to her for quite a while before and after moving past her.
  • Xtreme Kool Letterz: Left. 4. Dead. (Probably meant to be a nice little poke at the number of Survivors, though.)
    • And the number of full campaigns, the number of playable special infected, the maximum size of each team, and oh no I've gone cross-eyed.
  • You ALL Look Familiar: At least the developers tried to avert this - there are twelve different variations for every single model, which number to around one-hundred.
    • Developer commentary reveals it is MUCH more complicated than that. Each model variation for things like zombies and cars can be altered with the use of a "filter", which doesn't change the look, but does change things like dirtiness and bloodiness, as well as general clothing or damage level. As a result, each singular model in the game can be modified into dozens of different looks.
    • Played straight with the Special Infected, presumably to simplify gameplay.
      • Except in the sequel, maybe; there's a screenshot showing a Boomer that looks exactly the same as in L 4 D 1, except for a different hairdo.
  • You Have Outlived Your Usefulness: Special Infected which are stuck or otherwise unable to catch up to the Survivors will occasionally be killed off by the Director, with the death noise often being faintly audible to human players.
  • Your Head A Splode: Shots to the head of regular zombies with primary weapons leave only their neck and a Pink Mist.
  • Zerg Rush: The AI director will send these at you at random, when a boomer vomits on you, in pre-programmed Crescendo Events where you're forced to make a ton of noise to continue moving, or if you accidently set off a car alarm, or whenever he's bored, which is all the time. The normal infected also like to rush pipe bombs because of the smoke detector alarms rigged to them.
  • Zoey Is About To Shoot You!: Several of the campaign posters.
  • Zombie Apocalypse: Duh.
  • Zombie Gait: How individual zombies walk until they see you.
  • Zombie Infectee: Not only does he turn into a zombie mutant just before you can open the door, but he also calls a horde of zombies with a church bell just before that, the bastard!