Running A Tightrope: DOOM's Most Precarious Speedrun 

No... Don't make a RU-vid comment correcting him for calling them "floating skulls." Don't be "that guy" ... ... OH FFS! THEY ARE CALLED LOST SOULS!!!!! REEEEEEEEEEEEEEEEEEEEE!!!!!!

10:07 “I hate ledges.” 13:06 “I love ledges.” What a great character arc.

"Not by just 1 or 2 seconds, but by 3 seconds" Damn

Early runs: meticulous ledge walking Late runs: Tony hawk's pro skater ledge manouvers

Me looking at those walkways: “Hello you absolute ledges.”

The Chasm or: How I Learned to Stop Worrying and Love The Ledge

'Love the ledges, and they love me' He genuinely started to sound insane at that point.. I guess speedrunning chasm for a year will do that to a man..

_"This was however, before I started to love all ledges, all of them... and they me."_ Yep. The guy just went mad crazy.

Demonlord walked so they can run :')

i just love how this narrator makes these people sound like the pantheon of immortals

Damn hearing that Demonlord never held the record for Chasm ever again made me a little sad inside...

"Come on Looper we're about to cut the cake." "Just give me 32 seconds!"

"Doom is a very fast paced game" Me, slowly wandering around maps, looking for health pickups while praying there isn't some demon around a corner: "Yeah right"

"not by just 1 or 2 seconds, but by *_3 seconds_* "

The ledges drove him so mad he began loving them

Your presentation is fantastic. I've watched a few of your Quake and Doom videos now and each one has been really entertaining from start to finish.

The developing romance between demonlord and the ledges was a welcome twist in his character arc

Demonlord, on The Chasm: “I gotta wash the ledges, I gotta date the ledges, I GOTTA *BE* THE LEDGES!”

normal people: Yesss I'm finally done with this level speedrunners: *I'll F*ckin do it again*

I noticed something on Looper’s run, when he went through the toxic waste, he only took 5 ticks if damage instead of the other runner’s 6 ticks. That has convinced me that Looper had near perfect movement while running through the the toxic waste.

"Kai's record would only last four days" The eternal speedrunner curse.

this is the most granular explanation of a subject I have zero interest in but somehow I can't stop watching.

I like how in the beginning they're just inching their way across the ledges and by the end they're just jumping and gliding along them like they're skating not even worrying about falling in

I love how Sedlo stuck with his vision and kept running the ledges

Doom guy: *running across ledges at high speed and riding walls* Demons: *W-what?* **visual confusion**

It's hilarious how the comments are read out like in a documentary of Ancient Rome or something.

"You just need to know where to run, and be very fast." Words to live by

It's really mind blowing to see how much time and effort that went into improving this particular speedrun

Need to appreciate the fact DOOM used demo files for recordings so even 2 and a half decades later we can see exactly what those players did down to the exact input. It's like a nostalgic time capsule.

Demons be like: I think someone entered our domain a few minutes ago. Not sure. All i've seen was a green flash...

17:53 Damn, imagine being one of the early, mid-90s Doom speed-runners hearing this : “GoD i WaS dUmB bAcK tHeN, tAlKiNg AbOuT 38 bEiNg OpTiMaL”

Doom speedrunners playing this level and getting to the walkway section: HELLO YOU ABSOLUTE LEDGES

Other speedrunners: (in-depth 5 paragraph analysis of their run, saying every blemish they made and that they could have optimized. Pilger: “I really hate those ledges.”

Never stop these. You're very good at explaining and cataloging speedrunning history and breaking down tricks.

It's great that there is so much saved footage and documentation for these records that you can make such an in depth video of events that happened over 20 years ago

"The only one to complete a UV pacifist run of underhalls was ZeroMaster" decino: **laughs in mastermind**

Perhaps The Chasm could be a useful training tool for speedrunners looking to optimise their movement. It forces you to run a path with confidence and precision, which is a skill that could apply well to more barren levels.

i was rooting for demonlord the whole time. i'm glad he had a happy ending

A few things. 1: Demonlord is a legend. He was the one who invented this speedrun. 2: Sedlo is amazing. I could not get anywhere close to his runs even with years of practice. 3: Looper is a god at this game. let the numbers speak for themselves. 4: it's kinda amazing that even after all these years, doom is still one of the spookiest first-person shooters out there. I hope you all have a good day, and Especially you, Looper, if you're reading this.

This video was beyond fascinating. Watching the complete history of a speed run for a particular map really showed how intricate these things are. As an outsider with only passing knowledge of the community this really opened my eyes to how much passion is given to it. Kudos to this video.

You know your content is great when someone like me who has no interest and never played doom and no really into speed running watched the whole video through

Amazing video Karl, lots of fun memories came out when watching this. History of "The Chasm" was indeed something special, and it is what made me enter that seemingly endless battle for the "optimal" time :). 36 sec run is my personal favorite and hardest run I ever done. It was pure good old sr40 running :). Over the years I've got many positive feedbacks from doom community about my work and it felt good, each time, thanks to everyone for that btw...but man your introduction to me in the video was true blast :). Made me even blush a little and I thank u for that sir. Also I red all the comments. U guys made me realize just how old I am :) but also U made me satisfied to see there are so many of you who still rememeber/play this great game. Seeing this video makes me feel like all those hours spent on playing doom worth something. As a proud father of two young boys now I have something cool to show them, which involves their father youth.

2019: Doom Eternal will have platforming? This is not Doom, this sucks! 1994: The Chasm (exists)

Regarding the wall running glitch, the reason it happens is basically this: 1) When the player is running very fast in a particular direction there was a chance the player could run through a wall. This was because their collider could pass through the wall between frames. This is an extremely common issue in games even to this day. It is fixed by either adding in-between collision steps, or a raycast. Doom chose an extra collision step. 2) To correct for this the Doom engine, when detecting the player running fast in two particular angles, inserts an extra collision step in the middle of the movement. Two collision checks happen for the frame now but with half values so everything evens out in the end. 3) This fixes it! You can't run through walls anymore. However there is a bug in the wall sliding function. It uses the non-halved speed values and runs that twice. It should have been using the halved values like the other functions in the collision detection. 4) Doom guy runs double speed. Example: You're running at a speed of 16 units per frame. The game says wait! Too fast! Let's run collision twice with a speed of 8 units each. P_SlideMove says screw that and uses the speed of 16 instead of 8. Since it runs twice, Doomguy moves 32 units this frame instead of the desired 16. There's more complex math involved but this is the gist of it.

8:31 that gameplay went from 0 to 100 in a millisecond

I thought I'd seen it all in speedrunning. Crazy glitches, out of bounds, disassembling game code to find any advantage. But finding and abusing a rare rounding error in the trigonometry code? That is some seriously next level shit! And even that wasn't enough, he discovered and used a second brand new technique (pink demon 'bouncing' or momentum conservation) in the same section of the same run. And all this Herculean effort just managed to save 1 second. ONE SECOND. I'll just leave that there to let it sink in.

"The secret is to love those ledges..." *one speedrun later* I REALLY hate those ledges

It’s so surreal to me that i wasn’t even alive when the earliest records were set

I love the sportsmanship between these players. As an outsider to the community, they feel like a group of friends encouraging each other instead of fighting against each other.

"So sit back, and relax." **corrects posture, becomes tense.**

Me: I should really go to bed RU-vid: 30 minute doom speedrunning video? Me: Yeah thats sounds good

tomas: i really hate those ledges demon lord: "TRIGGERED"

The real record was the absolute legends we met along the way.

"maybe I don't take the time to get the rad suit and just lose some hp" like a caveman who just discovered fire in comparison to the later runs

Man, I really admire Sedlo's commitment to perfecting one map. He practiced it for years and kept improving. That's awesome.

11:45 Audio be like: OH GOD I‘M DYING. I AM MELTING IN ACID. THE PAIN IS UNBEARABLE. HELP ME PLEA- _ooh some ammo_ *teleports*

Doom Creators: WHY ARE YOU RUNNING?!

Another video from an ABSOLUTE LEGEND

"This is the epitome of human kind achievement, and I cannot think of a more literal perfect run ever existing. Everyone can begin marveling at how far life has taken us." "Two days later the record was taken down by 15 seconds."

Can we just a minute to appreciate that demonlord set the time at 1:58. Then through the fire of competition was able to push it down to less than a minute. That had to be a good day for him 😃

This is genuinely one of the best videos i've ever seen. I don't know what it is, but it just has a special place in my heart.

The last Doom vid was one of the best pieces you've ever made. I'm glad you're making more content on this legendary game.

i'm so speechless of what a system id software had implemented with the recordings, all the way back in those times. not just the recordings even, but also messages by users and some additional files. that's crazy, way ahead of their time. the way how well the video is made with the good journalist taste, it's like a documentary between the great slayers of past days who are now mostly closer to middle-aged men, to say the least. maybe in a 100 years, when games will be holograms or microchips for you to close your eyes and play, these DOOM recordings will be like the holy scriptures of gaming.

The way he speaks makes it sound like this is a nature channel covering how several competing species have evolved to overcome an inhospitable habitat.

I never played a doom game in my life, and i don't speedrun, yet youtube recommended it to me. And i loved it lol. Some people just have a way of telling stories that makes any topic interesting to anyone

23:48 “The record remained-“ Me: Good Job Sedlo, the final best speedru- “Until 2004” Me: WHEN DOES IT END

Wait that was 30 minutes dude I've seen 5 minute clips longer than this. Entertaining as hell

Lost Souls: Dude, are you okay? Demonlord: *Praise the ledges!*

I was only 12-13 years old in 96 but I used to get so scared because I get deeply emotionally attached to most games I play, I used to try and blaze through them. If only I knew about these speed runs back then! Watching this really brings back some memories! Great video as always!!!

I suppose you could call these runs... LEDGEndary.

Those text descriptions by the runners are amazing documentation!

These videos are such adventures to watch, very well put together and truly gives me an appreciation for ever single technique these incredibly high level runs use and how those techniques developed overtime.

Nobody: demon Lord rising from the grave 100 years in the future when his record gets broken

[Me at multiple parts in the video]: Ok... THIS must be the fastest time ever! Karl Jobst: Well yes, but actually no

I remember this video. It's great. I really like these speedrun progression stories because only insiders have all this info and it's really great to somewhat tap into the drama we missed out on. So very detailed and informative, I love it

I saw this video when it came out. Still couldn't resist clicking it. This video is one of the best on this channel, which is saying something because there are so many great videos on this channel. I appreciate the effort you put in and I always anticipate your next project.

"this time, I practiced a lot!" Yeah.. because before you were just slacking off.

The idea of pacifist Doomguy sounds all kinds of wrong...

This guy really makes these videos interesting with the amount of details and explanations. Well done. Suddenly I wanna be a video game speed runner.

This was incredibly entertaining, I respect both the dedication that went in to make the video and also think of all the hours over the years that went into this record. It's kind of mind blowing. Pretty dope.

You've put your heart and soul into making this video. Commentary: 10/10✔ Explanations about game mechanics for dummies like me: 10/10✔ It even has chronological arrangement. You definitely got my like

ABSOLUTE LEDGES

I've watched it maybe six times now? I go back to it every other day, because it's so interesting to listen to. Not only because those people are training and breaking Doom's records for 27 years, but because your material is so well organized, so well written and edited. This is so relaxing to watch. Thank you, sir.

This has quickly become one of my favourite videos. I put it on as background noise when I'm doing chores because I never get tired of hearing about this speedrun.

Watching this like "why isn't he bunny-hopping?" Then I remember old-school Doom didn't have jumping. I'm so used to modern games having jumping and seeing every gamer bunny-hopping everywhere (either for speed advantage or just screwing around) that seeing Doom w/o bunny-hopping struck me as odd.. then I remembered it never had it.

Those ledges broke that man. RIP DemonLord.

I absolutely love your videos. Whenever I’m having anxiety or get depressed these videos help me so much. Thanks 😊

Never thought a speedrun video of a game I didn't play at all would keep my eyes on the screen for 30 minutes, nice video!

I always laughed at the "Par Times" at the end level tally screen. Never expected them to actually be beaten by speed runners.

I love how benign the subject is, but I'm completely entranced. great narration, great video. I can't get enough!

I love the runner notes. They're like the journal entries written by soldiers in the battlefield. A historical document to be preserved.

Bet those ledges got alot easier once optical mice hit the scene in 99 lol

The Chasm, aka "Super Monkey Ball Doom Edition"

I love these videos. I've been watching them the past few days. Your voice and presentation are super entertaining. Thank you for making these!

This is really a high quality video. Your tale telling skills are amazing. I've watched the whole thing without getting bored.

I wonder if Demonlord, Anthe & Sedlo and the others will see this video. That would be really cool!

Sedlo's 36 wasnt about being the world record. It was about being art. It was about being the absolute best. It was about achieving absolute perfection. And I can respect that.

This is well made, great video and build up! I really like the discovery of implementing new strategies like wall running and collision with that demon, just to gain ‘some’ more time. Very interesting stuff

seeing the date on these completely amazed me. i am entirely unfamiliar with doom and how it works, and looking into how demo files work was so cool. it makes me SO happy there's so much history preserved with these, especially with doom being such an old speedgame. thank you for covering stuff like this!!

I won't lie just thinking of doing that stage casually is nerve-wracking, to see them just obliterate it in under a minute it utter madness. I knew Doom could get crazy with the pursuit for speed but this was just insane to watch!