Out of Bounds Secrets | Left 4 Dead - Boundary Break 

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The elevator shaft is likely due to Versus mode where you can play as the infected :)

1:02 Fun little bit of trivia for this "collect all 10!" detail: This is actually a joke about the cancelled 10th class for the original Team Fortress, the Civilian.

The elevator shaft is probably fully modeled to help support VS mode play, to provide in-world navigation for the infected.

The reason the newspaper has Breen on it is because that model was originally made for Half Life 2 but was used as just a generic newspaper in pretty much all the other source games. You can find it in CS: Source, for example

The stamp on that gun is actually 1911 A1 and is pronounced more like "nineteen eleven a one" The A1 model is an iteration of the original design with some improvements that came out later in 1926

Most source engine games from after the orange box use combined models for both the viewmodel and world model as opposed to separate ones like in Half-Life 2, Portal, Counter-Strike Source, and the 2007 version of Team Fortress 2. Left 4 Dead and Left 4 Dead 2, as far as I recall, use combined models, which is why you can make out words on guns that other players are carrying, for instance. As far as the molotov goes, the interior stuff *is* liquid. They probably set the material to be opaque later on in development either for performance reasons or because transparent textures tend to be buggy. While Valve is also known for making elevator shafts for no reason (Portal,) the Left 4 Dead one is fully modeled for Versus mode. The newspaper is just lifted directly from Half-Life 2, hence Dr Breen. I believe you can also see mentions of the 7 hour war on that model.

FINALLY LEFT 4 DEAD, I ASKED FOR L4D LIKE 2 YEARS AGO LMAO

I'm surprised you left out that the Menu Screen is a loadable level in the game. It's just the first level of No Mercy, but it's an odd fact that you can get the game to load it and walk around it. There's no safe room available to complete it as the full map isn't rendered though. Another funny thing is on No Mercy, the Humvee that's crashed into the apartment building will instakill you if you touch it. This is the humvee that's behind a fence that you normally can't get to by yourself.

Man, the L4D games were so dang good. Miss that era of gaming so much where gameplay was first and foremost and 'monetization' was buying the actual game and DLC. Crazy how much stuff is hidden in this game, awesome video Shesez!

Fun fact about the elevator shaft in No Mercy: When you enter the elevator, you are on the 4th floor, and it takes you to the 28th floor. As you go up, you can see the elevator doors to other floors and actually count what floor the elevator takes you to. Problem is, it doesn't actually stop on the 28th floor. They probably didn't expect anyone to notice or bother counting. Oops.

When the video ended I thought to myself "wait, that's it?." I feel like you could've gotten way more out of L4D, since we barely got anything outside of the first campaign. Here's a freebee: though you don't generally see it ingame unless you have a bad run in with a Tank (or a Charger in the sequel) the final map of the No Mercy campaign (and maybe the others as well, it's been a while since I've played the games) does not correctly show the Mercy Hospital according to what the players go through in the 4th map, specifically the section after the elevator. That area shows that the floor you end up on after the elevator was receiving renovations and thus has openings in which the players could be knocked out through to act as a final, 1HKO hurdle before reaching the end of the level. This construction section is not seen when observing the entire building, either before the statistics roll, getting sent flying or just by no clipping around the map.

I think the deranged cow on the cereal is a reference to Mad Cow Disease, which, in fiction, a mutated version of causes the zombie outbreak.

I don't think the cleaning powder is called "Scout" I think it's called "Scour"

I really like that the model of the helicopter pilot looks a bit infected since he's said to have turned into a zombie mid flight in another stage.

I remember that Left 4 Dead was my first proper Zombie game, besides badly made Quake Mods that are also Zombie-like. Still one of the best Zombie games.

6:02 man this was too funny. Its a 1911, pronounced nineteen eleven. I guess I shouldnt be too surprised you dont know the name of it, but the 1911 is the second most popular gun in America (next to the glock) and you can find it literally everywhere in media.

The actual default texture in the Left4Dead Hammer editor is actually a pills billboard texture. The grey grid is one of many dev textures, usually used when you're just trying to make a solid layout. Usually that dev texture would have nodraw applied to it so it gets permanently culled, but someone must have forgot or just not cared enough to remove it.

03:36 When you stay without your pills for more than five minutes.

2:50 Here's a tip for your L4D2 video: host_timescale 0.1 in the console will slow gameplay down enough for gameplay to be basically frozen. It's a godsend for stuff like this :)

10:08 I'm pretty sure they intended for the bottle to be see through and that's why there is so much detail inside, and of course, the cilinder inside the bottle is the liquid.

Im glad you cover left 4 dead, left 4 dead hads always, and will always by my favorite video game of all time!

The helicopter at 8:30 with the number 23 on the side is actually the same helicopter that is crashed into the roof of the cut survival map Highrise. It's likely a re-used texture. Also, about the burger tank sign at 10:00 - you actually pass through a burger tank in map 3 of No Mercy. They have some pretty good deals on the menu. When you do L4D2, make sure to look inside the boats on The Last Stand's finale! There's a little easteregg there that most people don't know about, since you can only see it by noclipping. And don't forget the map in Blood Harvest that shows the original locations of the campaigns before the story was changed. Man, there's just so many little details that are worth looking at, I'd write an entire novel if I went over all of them.

What's interesting about 6:00 is that not only is "Finleyville Armory" a play on the manufacturer "Springfield Armory", but the story of Back4Blood by TurtleRockStudios, who helped in the creation of L4D, takes place in Finleyville

almost gauruntee the molotov was originally going to be a transparent bottle material but they switched to a solid texture to increase performance. semi transparent textures can be one of the more impactful things on GPU performance so its usually one of the first things to get nixed when devs are looking for performance boosts

To clarify why they keep what would usually be a skybox in the scene: from my understanding, they have a separate camera rendering the skybox content that mirrors the position and rotation of the main camera. This allows the environment to feel “real” and have scale when you move up and down through a level. When you use a painted skybox this image is easier to figure out and makes the environment feel fake, even if you don’t notice why. They use this technique often to make the scale of spaces feel very large also, like in Portal 2. Games don’t like massive spaces (floating point numbers get dodgy) so this allows for the appearance of huge environments without needing to deal with all of the problems this would create.

Too short video :( could've shown a lot more out of bounds places, map-specific that is. Like the plane which fall down from the sky, where it starts from etc... Oh well.

My first boundary break was on left4dead. I remember people showed me the ledge on the no mercy spawn roof that you could jump on and go on the side of the map that was blocked. It was very creepy and there was an insta kill when you touched the military hummer

As a long time L4D1 fan, this was very cool to see! Thanks! When the game first came out, a friend and I played it non-stop for years. My disc eventually ended up getting so scuffed that I started having visual glitches in-game and had to replace it. The most memorable being a weird, stretched out woman's face (maybe a zombie, but iirc, it was more detailed than that) that was plastered onto 3 cabinets in the starting hospital saferoom on that elevator level. I have an old flip phone somewhere with the photo saved on it, but no way to turn the phone on. Have never heard of anyone seeing that before or having anything similar happen. I still wonder what it was exactly. Jump scared the hell out of me, though, loading into that and facing 3 scary cabinet faces haha

Man, I still can't believe we have been able to keep boundary break alive for so long. This gathers nothing but praise, not an easy task to keep a channel like this alive for so many years.

I really hope the survival map with the clipping spot with a Molotov under the map is going to be here

7:05 I’m pretty sure Bungie did this with their skyboxes as well, and I’m certain other companies must do it as well. I know this because I remember my friends and I spending hours in Halo 2 glitching our bodies under the Burial Mounds map, since the skydome model is located just under a certain part of the map, you’d see your Spartan’s body in the sky like a colossal ragdoll, it was hilarious.

I am pretty sure the whole messagd on the back of the TF2 cereal box is "Fully poseable with working weapons!"

9:04 its for multiplayer so the special infected can climb, at least i would assume so. Its been awhile since i played L4D Mp Only reason i say i assume is cuz you cant get to the player so its possible the game simply reloads you to the top

Skyboxes arent necessarily always under maps, they can be anywhere outside of the viewable skybox

Freakin loved playing this game in co-op! Me and my buddy back in the day bought beer and a Taco Bell 20 pack of tacos and played all night!

The pistol doesn't say 'one nine one one a i', it's "1911" (the year) "A1" (as in revision 1), which is the real name of the real Colt M1911A1 pistol.

Glad you covered the maps in Left 4 Dead 1, because the versions of the maps in Left 4 Dead 2 are altered (I think for versus mode). In Left 4 Dead 1 they are in their original form.

Great video! I personally greatly prefer when you make videos on older games like this than when you cover recent games I haven't had the opportunity to play for substantial amounts of time.

Oh i was waiting for this for a decade ! thanks Shesez :)

The gun is a m1911a1 which is a colt model, but the brand name is based on Springfield armory who also makes them but not specifically the m1911a1.

"Collect all 10" - 10th class reference?

Finally the white pupils are explained. All these years I thought I was going crazy or that there was a bug. I can't fathom why Valve made Zoe's low poly model this way.

A nice little smorgasboard of the kind of stuff you can find out of bounds in L4D here and a great explanation of the 3D sky box in valve games too - friends and I would have tons of fun spawning enemies into the 3D sky box area (when it had solid ground at least) and being amused at the giant characters looming over us when we returned to the playable area afterwards. I've explored every nook and cranny of these games with noclip but the level of detail model stuff here was a really cool addition as I've never seen those before. Your idea about where the survivors go when on a rescue vehicle is spot on too - almost every finale has a little box for survivors to teleport too - though not all! Some finales teleport them back to the starting safe room instead. If the game is being a bit laggy, you can sometimes see this for a second in the first person view as the camera fades to black to switch to the ending cut-scene. One point of interest that wasn't covered here is in The Sacrifice campaign - noclipping out from the safe room at the end of chapter 2/the start of chapter 3 reveals that between map loads, the safe room actually changes orientation compared to the outdoors scenery - the outdoors that you exit into technically shouldn't be able to co-exist with the outdoors that you entered from in the previous map, even though it's hard to notice in gameplay. Another fun point of comparison would be "The Port" chapter on both The Sacrifice and The Passing. You'd expect them to more or less be the same as they're the same location within the story, but where The Sacrifice has a smaller playable space in the finale, they culled out a surprising amount of detail when you go exploring rather than just leaving the existing geometry and props out of sight. A little tip when you get to L4D2 - typing in "fogui" to the console brings up a little panel of options for disabiling fog and increasing draw distance etc. I really enjoyed noclipping around these games myself but L4D2 was surprisingly hard to find the 3D skybox models on for whatever reason until I figured out how to disable fog and increase how far the game rendered, etc. You might already know about it because you're clearly aware of fullbright commands for clarity in this video, but I did find L4D2 a lot less friendly to exploration due to the fogging/lighting choices they made in the game.

If I had to guess as to the reason for the projected skybox and tiny world under the map, I would guess it's to be able to put high quality models far away (like the Hospital) where they would otherwise be outside the draw distance.

Definitely make one for L4D2! Glad to see you’re still making videos dude. That video about the concerns of lower views was worrying. I’ve had your videos on in the background ever since.

Just wanted to say myself and others would gladly accept a 15 episode series of you doing this for each stage. And while I actually love back for blood as much as I love Left 4 Dead and vastly prefer world war z over Left 4 Dead I just know that there are so many secrets.

I've been waiting for left 4 dead for so long! Thank you!

I'm guessing the extra geometry inside of the bottle at 10:24 is used for a shader effect to simulate the liquid. It's basically a piece of geometry that'll get warped/streched by the shader code to simulate a fluid moving around inside of it. When done right it's a great looking visual effect that's not very costly to render.

So my guess for why the No Mercy elevator shaft is real is for the versus mode, so the Infected team can use it as a hiding spot.

would've never thought a left 4 dead boundary break video would be made

We making out of the boundaries with this one

Something of note on the boat riding off at the end of finale... Sometimes at the end of versus matches, when the cutscene triggers, you can see a couple of the models just fall directly down into the water as the boat floats off. I've seen this happen on Swamp Fever as well in L4D2, with the characters actually being considered dead after falling through. Pretty upsetting in close games, not getting the survival points. Though, Swamp Fever finale is a glitchy mess in L4D2 versus anyway. If the first team doesn't make it to the plantation and trigger the finale on the radio, the second team gets the ending as soon as they hit the radio. Bypassing the finale all together. It might be patched on PC but not on Xbox.

That skybox is very much how jedi academy did theirs. Was a neat feature to use. We saw that burger tank sign on our first playthrough lol. I always love looking at the details while playing through.

This was long overdue surprised you haven’t covered this game before

As someone who used to make maps in source engine (TF2 and half life 2) I still can't understand anything, the maps just work I want to cry daily

That cleaning product was "Scour", not "Scout".

Definitely got some flashbacks to cr1tikal's clips vs mags meme but also... source games are like, so unnecessarily practical. I feel like when you pull back the curtains, you're not see the guy commanding Oz; instead just seeing a miniature version of Oz who clearly is being projected as the skybox.

6:11 Fun fact: It being housed inside the gun is what means it isn't a clip, it's a magazine

Valve does have interesting ways of doing things...Ive been exploring these maps through Gmod, its really the easiest way to boundry break any Valve game.

Yeah pretty sure inside the molotov is liquid because you actually see through the bottle when holding it. You can see the liquid move too so I figured fully modeling the rag is for that too

this game is so complex and has SO MUCH that i think there could be 1 hour worth of content of just l4d1 or maybe more.

i've done a bit of exploring myself in l4d2 and i would LOVE a sequel video. valve games always have such fun out of bounds treats and easter eggs you can barely see

These games and the details in them, especially on the zombies, is just insane. Valve moment

So here's an interesting thing about those "WALL 128.128" placeholder textures. When a map's layout is finalized and they move on to doing the "artpass", replacing the textures with the ones they actually want to use, a lot of placeholder textures outside the field of play get left in. But most of them don't survive the process of compiling the map from the editable source file to the fully optimized and prelit one that ships with the game. Any face that's smooshed up against another one or touches the void outside (where the skybox disappears) just gets deleted to save disk space and compile time. Where this gets interesting is how we know this. For some reason, most of the data from the editable file is dumped into the compiled one; this includes the exact 3D blocks the map was built out of and what each side was textured with. It's possible to use a third-party tool called a decompiler to reverse-engineer a mostly-working new source file from it, and see all the textures that were removed. Depending on who made the map, they might be grid placeholders, or they might have been converted into the same realistic brick and wood and concrete textures used on the insides.

For most of the objects preloaded out of view is for VERSUS

I thinks really cool that you released this video early in the Source Out Of Bounds video.

2:51 there's a method of manipulating time of a source game called "Host_timescale" set that to 0 and it stops time, alternatively you can lower or raise its default value to go into bullet time or double time. There might be some other command that doesn't affect movement but I don't know it.

The pistol also had M7XTAC on the side. Cyberpunk 2077 crossover confirmed

This game looks NOTHING like I remember without all the lighting and filters, holy shit. What also surprised me is that there is little lighting baked into the textures, so the way we know and love the game to look was all in-engine. I also always wondered if there are any non-Valve games that use skyboxes in the same way. A tiny background area that's out of bounds, projected around the main game area.

I remember always being aware that the elevator shaft in No Mercy was fully modeled because I saw Criken do the propane tank glitch in his funny moments montage. If you throw at a player, they clip and fall through the floor. Unfortunately was patched out soon after, but I'll never forget messing with other people and hearing them scream after they fall through the floor lol

I will never forget learning how to get out of the map and finding secret rooms in these games.

I'm certain this exact newspaper at 1:27 is fully redesigned in Half-Life Alyx with fully legible text and a younger Breen.

Super excited to see more hidden stuff from L4D2!

The reason there's a tiny map miniature being projected unto the skybox is to give that scene a sense of scale without stretching the limits of the map and ruining the performance. Putting giant buildings and such hundreds of kilometers away at the distance won't work in source engine.

i still wished that you could cover that crashing plane sequence in Dead Air because i used to think that it was part of the skybox but it actually is a physically object in the map itself.

YESAAHHH!!!! Left 4 dead is the GOAT. I still play it to this day. It is endlessly replayable thanks to the community’s and its mods

"No!, Louis is a character from l4d1 2008, he can't mew-" Louis: 3:34

I'd love to know what's beyond the boundaries in Ghostbusters (2009). Take the camera through the walls like it's a ghost.

Therapist: "Shaved, dehydrated, lizard Francis doesn't exist he can't hurt you" Shaved, dehydrated, lizard Francis: 3:58

0:30 it doesn’t really look deranged, that’s just kind of what cereal mascots look like

If I remember correctly you can see a dev texture in game in versus mode in the airport map of Dead Air campaign after the baggage section if you play as a hunter. Think there is an atrium or something, you just need to jump up. You can also get the old versus menu if you join the versus team, through commands, in campaign mode.

Pretty sure the elevator shafts are fully modeled for versus mode where the infected players and traverse through them

Tip in case you cover Source 2 games: I'm not sure if this goes for other Source 2 games, but in Counter-Strike 2, the 3D skybox isn't actually part of the map. It's a completely separate map that I guess is loaded at the same time as the main map. So if you can't find the 3D skybox, it's in its own map that you'll have to load into separately to get a good look at it.

“I have loads to show you” most of the vid was LOD

My brother and I always knew that the elevator shaft HAD to be the full length, because your jump gravity gets all messed up when moving up or down in an elevator. You either get tiny jumps while moving up, or gravity jumps while moving down.

At 3:00 i appreciate you downloading the model and showing me that way. I’m a low tier RU-vidr and I appreciate how people like you go the extra mile. It took you like more than 25 mins to produce 3 seconds of video. It’s little stuff like that people don’t realize what it takes to produce a video like this and gloss over it but I appreciate you for that. I really wanted to see the eyes

6:08 small, but common mistake - it's actually a magazine, not a clip. A clip is more like a strip that holds rounds together for loading. It basically only holds them by the back end. Most modern guns load using a magazine, a block that entirely surrounds the cartridges. Most people unfamiliar with firearms get this wrong all the time.

I miss this game, oh the nostalgia sitting in my barracks room on the weekend playing this all day on my 360 when I was in the navy. Good freakin times!

its crazy how there a so many performance saving techniques that Valve DOESN'T use, purely because the Source engine is INSANELY well optimized and made.

The Newspaper is literally just a Hl2 prop.

This really shows how important lighting is in videogames.

That Team Fortress Reference is interesting because there aren’t 10 characters, only 9

The TF2 Cerealbox said "With Functioning Firearm!"

"Bullet clip is housed inside the gun" has very strong "pee is stored in the balls" energy

1:30 I think this is because the prop is likely a reused asset from half life 2 itself

Just so you know L4D2 does includes all of L4D1's characters and assets pretty much as it's levels too. More supported as a game too now. I imagine it's noclipping command flying around the maps could find even more interesting things in the next video as well! Excited your starting the L4D series. Would love to see you touch up a lot of the Valve games like Half Life 1 & 2 and it's episodes respectively!

Yesss! ❤ I am SO glad you covered L4D! Been waiting a long time for this. I'm also excited for there to be L4D2 😊

Omg I been waiting on this one for a minute 😂😂 Thanks so much bro ❤❤

elevator shaft is fully modeled because of the versus mode, where the infected can spawn and climb up