Following the full disassembly of Sonic CD from the amazing work of Rubberduckycooly, I am releasing a port of Sonic CD running natively on PS Vita.

The porting is pixel-perfect and it basically runs on an internal resolution of 480x240 upscaled by 2x. This is an unofficial port, meaning that I forked the original source code and modified it to make it running on PS Vita. I am already in contact with the original author to integrate my changes on his repo.

Please follow the instructions on the release page to make it work. The VPK itself does not contain any copyrighted assets. It's not 100% perfect but it's fluid enough to be fully playable.

DOWNLOAD VPK

 

[Rich8606]

I see, oh well. You can try reading separate tutorials on permanently hacking your Vita then.

 

[raxadian]

What do you find frustrating about them?

Do you get recipes online or you watch a video instead?

 

[Rich8606]

I'd use this, but my Vita and PS4 both run off the same master PSN account. So if I hacked my Vita and it got flagged that's my entire library disabled. Probably not worth the risk, right?

It's fine, I hacked my Vita and I can still play online with the same PSN ID I use on my PS4. I'm playing Helldivers (legit copy I bought off PSN) on my hacked Vita, and I overcloclocked it, Helldivers 4 player online runs better than the official firmware.

 

[raxadian]

It's fine, I hacked my Vita and I can still play online with the same PSN ID I use on my PS4. I'm playing Helldivers (legit copy I bought off PSN) on my hacked Vita, and I overlooked it, Helldivers 4 player online runs better than the official firmware.

Yeah, Sony likes to pretend the PSP and Vita don't exist nowadays.

 

[Rich8606]

Do you get recipes online or you watch a video instead?

Hmmm, very different though. Vita hacking text tutorial can be very technical and it usually assumes you already know what's what. It's like "Put this ,VPK file on your ur0 or ux0 directory", I was like VPK? ur0? ux0? What the hell is all this? Whereas with the video by Tech Savvy Buyer, he actually explains what VPK is, what the difference between the two directories, etc. It's much clearer and simpler in the video tutorial, just follow exactly what he does.

 

[Deleted User]

Do you get recipes online or you watch a video instead?

I prefer following tutorials in both text and video form.

 

[diggeloid]

Has anyone tested this on a real vita yet? I tried it on mine, but it crashes as soon as I try to open it. Does the game write to a log file or something else I can look into?

 

[seseiSeki]

I prefer text, sorry.

Me too. I usually watch a video to get the gist of what I'm about to do and then just follow a text guide.
Also: Just give this person a link already
https://vita.hacks.guide/
Plailect's guides are very easy to understand, explain every step as thoroughly as possible (sometimes too thoroughly) and are usually up to date.
---

The release notes only mention "Data.rsdk" and the optional video files. Are the other files not needed at all?

Edit:
Great port. I just played through the game and everything worked. The later stages Wacky Workbench, Stardust Speedway and Metallic Madness dropped a few frames during heavy background effects or with lots of sprites onscreen. But nothing too crazy.
The bonus stages on the other hand are pretty slow, which is good for me, since I don't like them. (Still couldn't beat the second one...) Oh and when completing bonus stages, the background image doesn't reach the far right side of the screen and instead displays what was last displayed in that area. See screenshot.
I also encountered a few crashes. I don't know if you, OP, know what to do with these crashdumps, but I just zipped them and put a txt next to them with info on what I did, when the game crashed.

 

[JeffRuLz]

Oh and also the DS!!!

The Sonic CD mobile port actually started life on the DS. It was never finished but it's still pretty neat.
https://www.headcannon.com/hchc/SonicCDDS/

 

[MikaDubbz]

I prefer text, sorry.

Text is more reliable anyway. Video tutorials can often gloss over important info and tend to not mention when they were made and what firmware they were made for, so the information being given can often be outdated and you may not know until too late.

 

[cvskid]

I think text tutorials are better too. It's just that some people are visual learners so i can see why people would want video tutorials.

 

[SMVB64]

Wiiu port would be siick

--------------------- MERGED ---------------------------

Wiiu Port would be siiick

 

[abda]

View attachment 240541​

Following the full disassembly of Sonic CD from the amazing work of I am releasing a port of Sonic CD running natively on PS Vita.

The porting is pixel-perfect and it basically runs on an internal resolution of 480x240 upscaled by 2x. This is an unofficial port, meaning that I forked the original source code and modified it to make it running on PS Vita. I am already in contact with the original author to integrate my changes on his repo.

Please follow the instructions on the release page to make it work. The VPK itself does not contain any copyrighted assets. It's not 100% perfect but it's fluid enough to be fully playable.

Nice! if I get or ever find a PS Vita I will make sure to install this.

 

[Ajlr]

The Sonic CD mobile port actually started life on the DS. It was never finished but it's still pretty neat.
https://www.headcannon.com/hchc/SonicCDDS/

Oh yeah right. I remembered.

 

[Xeeynamo]

Me too. I usually watch a video to get the gist of what I'm about to do and then just follow a text guide.
Also: Just give this person a link already
https://vita.hacks.guide/
Plailect's guides are very easy to understand, explain every step as thoroughly as possible (sometimes too thoroughly) and are usually up to date.
---

The release notes only mention "Data.rsdk" and the optional video files. Are the other files not needed at all?

Edit:
Great port. I just played through the game and everything worked. The later stages Wacky Workbench, Stardust Speedway and Metallic Madness dropped a few frames during heavy background effects or with lots of sprites onscreen. But nothing too crazy.
The bonus stages on the other hand are pretty slow, which is good for me, since I don't like them. (Still couldn't beat the second one...) Oh and when completing bonus stages, the background image doesn't reach the far right side of the screen and instead displays what was last displayed in that area. See screenshot.
I also encountered a few crashes. I don't know if you, OP, know what to do with these crashdumps, but I just zipped them and put a txt next to them with info on what I did, when the game crashed.

Thank you for your precious feedback! I am not sure if I can use the coredumps, but I will find a way to do so. I also noticed the txt file inside that describes what caused the crash . Regarding the screenshot when you complete a bonus stage, unfortunately that's an issue with the data files that do not expect to go beyond the resolution of 402x240. I was aware of those minor glitches, but they are the compromise to have a pixel perfect resolution without modifying the game's data (or patching it on-the-fly by the eboot).

 

[seseiSeki]

Thank you for your precious feedback! I am not sure if I can use the coredumps, but I will find a way to do so. I also noticed the txt file inside that describes what caused the crash . Regarding the screenshot when you complete a bonus stage, unfortunately that's an issue with the data files that do not expect to go beyond the resolution of 402x240. I was aware of those minor glitches, but they are the compromise to have a pixel perfect resolution without modifying the game's data (or patching it on-the-fly by the eboot).

I expected, that the Bonus Stage thing happened, because of the resolution. I remember toying with the resolution of the Android port which also produced results like that. Kinda unfortunate, that it's limited to 240 vertically, but hey. I'm a pixel perfect fan, so that's a compromise I'll take

About my question regarding the files: Do we only need Data.rsdk? What about the font, images or sounds files?

 

[Xeeynamo]

The decompilation from rubberduckycooly where this port is based from, only uses Data.rsdk and the content in the videos folder. The other files you mentioned are HD asset only used by the PC version and from the in-game menu and they are ignored in this port.

 

[PZT]

Thank you for your precious feedback! I am not sure if I can use the coredumps, but I will find a way to do so. I also noticed the txt file inside that describes what caused the crash . Regarding the screenshot when you complete a bonus stage, unfortunately that's an issue with the data files that do not expect to go beyond the resolution of 402x240. I was aware of those minor glitches, but they are the compromise to have a pixel perfect resolution without modifying the game's data (or patching it on-the-fly by the eboot).

The pixel perfect resolution is so important, it's odd that SonicMastr500 is in the r/vitahacks subreddit saying that it'll be "fixed" as if that's something wrong, and saying he's not sure why there's a slight black border.
I wonder if they don't notice the difference, some people don't (and they're lucky lol because I hate being bothered by it in ports of other games), but to me it sticks out to me like a sore thumb when the image is stretched to uneven pixel widths/lengths, and I'd much rather have a small black border over having the integrity of the whole image hurt to where it's hard to look at
At most, the pixel perfect image should be centered so the bottom bar isn't taller than the top, but it really shouldn't be changed, if the artifact is necessary to keep the resolution of the image intact and maintain integer scaling it should be kept, I very much hope you guys keep it that way when merging your ports together

In terms of bugs, I've received a few crashes so far, like clearing Wacky Workbench Zone 3 when it's in bad future mode on save file 1 crashed for me every time and I couldn't progress, but other than that and some random crashes here and there where I didn't know what caused them, it's a near-perfect port, beautiful on the OLED
I also noticed a bug in that the slowdown in the special stages seems to desync the timer. The actual timer that ends your special stage playthrough seems to be absolute, the exact amount of time every time, but the amount the time actually elapses in the numbers on the HUD seems to be linked to the game speed, so if there's slowdown and the special stage is not running at full speed, your time will run out before the timer on screen is at 000

 

[Rahkeesh]

When it comes to a device this small I personally prefer a sharp interpolation that fills the entire screen. Although I would like the option for pixel-perfect to remain for those who like that.

I also have to say that on most platforms the remake bonus stages are absurdly fast compared to the Sega CD original. Not just higher framerate but the overall game speed is just faster, making it more challenging. So I'd consider them running slower a feature really.

 

[seseiSeki]

In terms of bugs, I've received a few crashes so far, like clearing Wacky Workbench Zone 3 when it's in bad future mode on save file 1 crashed for me every time and I couldn't progress, but other than that and some random crashes here and there where I didn't know what caused them, [...]

Interesting. I completed the whole game in Bad Future and Wacky Workbench 3 didn't crash for me.
Although, I used the US soundtrack, but I don't think that would lead to the game not crashing ^^'