It was pretty fun digging in to another game like this. Cuphead is actually massive when you compare it to Iron Lung, so I couldn't show everything. Although, I did get some interesting questions about secret/unused bosses. Decided that was worth a little follow-up investigation, so I posted my findings here: twitter.com/entropy_phi/status/1551622312524488704

Keep in mind that this is compiled and then decompiled code, meaning it won't be as clean, commented, or understandable, but will be more optimized

The use of separate time layers is fascinating, as is the rest of the code breakdown... awesome work!

The behind-the-camera stuff is really interesting. The way elements move throughout the levels is reminiscent of how cells were used and moved around in classic animations when they were still captured in analog! Scenes and scene elements would be painted on to separate cells that could be moved forward, backward, up, down, and side to side to create the illusion of movement and distance from the characters animated on other cell layers. Very cool stuff.

Fun fact: The secret boss fight in the DLC is actually The Devil's unused 2nd phase where you're supposed to beat the Angel and Demon before you fight The Devil in his giant form, you can tell by the Angel and Demon's knockout animation where they go into the skeleton's eyes. The Devil's flesh would be restored and thus you'd fight the giant Devil as normal.

I really appreciate these series. It's fun to see what goes on behind the game.

Rather interested in how the King Dice fight is loaded. Seems like that one would need dynamic loading as to keep the game runnable in more machines, but maybe I'm overestimating individual assets' RAM usage.

It's possible the random chance of rendering broken sprites may have been to avoid flooding the screen in a worst case scenario. If you see a visual bug, a player may report it, which allows for a fix. But you don't want this bug to be gamebreaking or make the experience bad until that fix.

If I had to guess, the 1/10 chance of showing a broken sprite helps find broken stuff without affecting gameplay too much and also means of an important sprite breaks, you have a chance to see it

This channel is way overdue to blow up, your content is golden!

I'd love to see what the devs have to say on that chance to render bugged/bad/broken sprites thing.

Ephi: "The second phase of the boss" Also Ephi: *showing the second phase of the boss*

This has to be my current favorite KZfaq series. Please keep going!

This was a fun video to watch. I always wondered how the devs knew how to time when a scrolling background would change to another background. Examples: The airplane bosses (Hilda Berg, Cala Maria, and Esther Winchester)

That... certainly is an interesting way to handle sprite errors.

Just seeing those stages at full view was bloomin' awesome. Put me in mind of someone doing that back in the old days and then covering it with a dark box so you only had a limited viewpoint.

Man, I already had such respect for the devs of Cuphead for the animation process alone, but for all this coding, I only respect them even more!

I had actually encounter the unrended glitch in the final boss of the dlc, i was beginning the fight and than the screen turned white for a sec and it went back to normal, i was wondering what was going on and when i died the “failed” text was a also white but not cover the whole screen this time, i was so confused on what was going on until now knowing it was a rendering glitch! Also keep up the good work my guy you’re content is great!

I commented on your Iron Lung video about using Unity Explorer, I realize that the way you're doing it is a lot more efficient. Good idea to stick to your guns! Always love this kind of content... boundary breaking.

It's a very interesting visual. It reminds me of a particular scene in Underhero where breaking the bounds of the game was a final dungeon plot point.

This was really cool to see and really informative for someone who wants to be a game developer!

1:45 but if there is a little animation of how his body falls to eat the mouse, he doesn't teleport at all, you could say it's a kind of transition xdxd

I absolutely love this. I wish it could've been longer.

I'd love to see a break down of some of the other FNaF games. There's a really good breakdown of the first game, but I'd love to see how some of these mechanisms evolved through the second third and fourth games. They all more or less use the same movement mechanism, but there's a lot of other rng elements that would be cool to get an under-the-hood look at. Namely the third and fourth are what I'd love to see. Thanks for the awesome breakdown! It's always great to learn more about the unique techniques developers use to create their games!

7:55 My guess: To add to the aesthetics the game tries to achieve, namely the fact of it mimicking an old cartoon. This randomness could add to the "cartoon" in this case being old and corrupted or smth... Or just to spice it up a little... Idk

This is super interesting to see as a beginner programmer, I especially loved your way of explaining what each code in a simple way please more of those ! XD

Great vid! Can't wait for the next breakdown And if you get enough requests, hope you make an vid/vod showcasing those other, more minor discoveries, as long as its good enough for you and the algorithm :) My personal would be if any interesting examples of those broken sprites are actually available. It just seems bizarre and cool that they'd randomize it, but maybe it's less bizarre than I think it might be as a non-programmer XD

I love these videos that just explain sick secrets in the game and how it works

"Neither. The answer is neither" got a chuckle out of me

Quick question: Can you move camera in a way to turn Cuphead into a 3D game? Which I know, undermines the whole premise of the game being a tribute to 2D animation, but... For science, I guess...

Very interesting and well made video. Keep up the good work!

that sprite error handling code is so weird...i can't think of any reason to do that...fascinating.

would be nice if you can show us the process on how you do this and we can continue to explore the rest, it looks fun to see the backend

Awesome vid, just like the Iron Lung one. Well done!

Well done man its well edited!

Quality content, my guy

Please make more of these! They're amazing.

Neat video. I'm a game dev myself and like digging through other people's games myself. Surprised their code wasn't obfuscated. When I took apart some other games they were difficult to parse. I did find some of the random changes you did a bit corny, but overall good stuff.

Oh man so cool! Thanks for taking the time to break this game apart! :)

A hollow night version of this would be awesome

I would love to see a video of every boss with the camera backed up. I would watch that whole video

I didnt even know it was actually 3d, nevermind all this stuff

Asian parents when they receive their child's report card 0:22

I hope your popularity explodes you deserve way more likes

Wow the hive is insane from a 3D perspective!

You should do these vidros with five nights at Freddy's! These videos were so fun to watch, already subscribed

The amount of work from Ephi and the cuphead developers 👏🏾

I have seen alot of custom or self written tween code in my life. The Libraries you mentioned are often slow or miss simple features, which can be done easily with your own tweening function. Also writing a tween function is not hard at all.

Bully McGuire but a hacker

No idea how to code but love your vibe and style of presentation, subbed 😎

you should break phasmophobia next. get the proton pack, found in the code, to spawn.

I think the 1/10 chance to render a bad sprite actually has happened in the saltbaker last phase

"Lets-a go!" 😂

Can you possibly try and show this type of video with either ori games? I feel that game will have some weird things happen when the camera is moved

Hey @ephitv, I'm new to your channel and thought this was awesome! An idea for a future video could be to see how the code for pokemon games work, in terms of the different probabilities of seeing and catching different pokemon and how the different probabilities of particular moves landing and status effects happening

I would really like if you went a little bit more in depth about why for example there are 6 different cameras and why each particle in the game is it's own MonoBehaviour. Also noticed there are test levels, would be cool if you explored some of them. But before anything, did you consider the legal side of decompiling?

Very cool to see background working of the game and would like to see more games.

nice video! i love seeing technical breakdowns like this

You kinda look like Bully Maguire, but cooler. 😅 That aside, thanks for the deep dive. It's fascinating to see how they do things behind the scenes and compare them to the 3D games, like in Boundary Breaks.

I'd personally watch a video of every boss fight recorded out of bounds lol

I would love to see more breakdowns. Subbed.

I wonder what some of the older castlevania games looked like behind the scenes, I'm sure there's some interesting stuff that occurs there

Make This A Series, This Is Great!

grim matchstick is so trippy

What a very fun an informative video!

Should have named sugarland shimmy grandmas house

Holy....Good work YT for recommending this channel again.

Great quality video , very knowledgeable too im a cyber security major it was cool to see code for the game

kindly do one for monogame. I'd like to see how celeste or hades looks like under the hood. Especially with the make-your-own libraries thing that goes on there

Oh, I never knew that Cuphead was made with Unity.

Great video friend! Keep up the good work.

Nice video! :) It'd be great if you try breaking phasmophobia or some old NES/PS1 games next time ^^

I wanna see every boss fight tho! I’d watch a full play through of zoomed out

They should make the screen smaller and put it onto an arcade machine

1:37 Ah, if all the stick comes out xdxd

among us/shovel knight styled secret 3D?

A nother youtuber played the dlc and saltbakers heart was white and when thay die a white bar comes up

Geuss you could do this for, say, FNAF 4.

yeah, no wonder how the speedruns are hell

Imagine this is what happened behind the scenes Edit: In the game’s story, not the code

THIS IS SO COOL!

Is it weird I want an until dawn out of bounds?

Out of the screen is not anymore so satysfating

In the rumor honeybottoms boss fight, you can see the third phase at the bottom of the camera. Does this mean if you shoot down in that fight you can do damage to the boss?

I did little to no codding in middle school yet my teachers saw i had talent for it since i learned and figured so much out by myself on my crappy and old pc. They suggested i went to the free coding course that school had and i was pretty good yet, after my parents kept telling me to focus on my studies and stopped bringing me to the course i gave up on coding. But whenever i find one of these videos/channels about coding and stuff, i feel like i understand every word of it and get excited like im the one decoding these things we don’t see!! I also used to hand write codes such as tweening but after i dropped coding, i forgot almost everything about it. I would give my everything to be able to code again and get courses but more professional and with right equipment!! I mean i don’t hate the subject im studying too. I would rather do coding as a hobby tbh. (Im studying english btw but i’ll study further into other languages in uni prolly)(if i can go to uni ofc since its hard being a student in Turkiye 😭😭) But yeah keep ul these videos! I’d love to see more coding stuff. I could watch them for HOURS

Awesome, gentle presentation and narration. Subbed. (I wish more gaming channels were calm like yours)

Hey Ephi! You have a discussion going on about your iron lung video on markipliers lore update on that game. You're spoken of in high regard

NOT THE BEEZ!1!1!1!!1

You got part of the episode in the wrapping up bruh, *pukes*.

This game is so special, would love something more in depth regarding the code and design. Are many of the levels set up in 2.5D fashion?

Cuphead Master Quest DLC when? 😂

speedrunners shoot the off screen boss parts to gain time

Tom and Jerry my favorite cartoon

This was an amazing video

Could you look into hollow knight next. Hollow knight is a huge game and it would be really interesting to see what's behind the scenes.

You should do bennet foddies getting over it next

Is it ever annoying that everyone calls you Spider-Man? I’m sure it was funny at first but maybe it gets old at times. Also good video :) I would have loved to see the Ribby and Croaks fight.

cala maria doesn't have a full body in the game? 🤔

Yeah, this is very interesting.

This guy look like tobby mcguire when he turned evil mixed with a guy from one direction