Version 1.1.0 - Sonic the Hedgehog 1 and 2 for PS Vita

I am proud to present a new version of Sonic the Hedgehog 1 and Sonic the Hedgehog 2 ports on PS Vita!

No worries, I heard your feedback through Internet, therefore I added a new section in the main menu:

You will be now able to change resolution between three different options: 320x240 for the original Genesis experience, 426x240 to enjoy the game as intended on the mobile versions, 480x240 to stretch the horizontal resolution to fill the entire PS Vita screen and 480x272 to use every single pixel of that gorgeous OLED screen. For the fan of pixels I introduced three scaling modes: Stretched, Fit and Centered. So now the choice if you want the black borders or not is entirely yours.

Also this release comes with a bunch of performance and fixes:

• Improve performance on string management
• Improve performance on game scripts
• Improve performance by using the hardware screen scaling
• Fix a bug where the 1up music was cut
• Fix a bug where some sprites in Aquatic Run Zone were corrupted
• Fix zone selection for Sky Chase Zone and Death Egg Zone
• More attempts to fix a crash when a new music is played

Version 1.0.1 - Sonic the Hedgehog 1 and 2 for PS Vita

This release fixes occasional crashes when playing new music, for instance when getting a new emerald, speed shoes, invincibility or when approaching a boss. Please refer to #2 and #14 to know about the content of those fixes.

Sonic the Hedgehog 1 and 2 for PS Vita

Sonic the Hedgeohog 1 and Sonic the Hedgehog 2 for PS Vita

This porting has been made by Xeeynamo upon the source code of the user Rubberduckycooly, who already fully disassembled Sonic CD a couple of weeks ago. This could not be possible without his efforts to bring the Sonic games from Christian Whitehead on PC!

Please consider to contact Rubberduckycooly to give him a donation. Follow him on Twitter too. If you want to donate me for this porting and my other open-source project, please visit my GitHub Sponsor page. Also follow me on Twitter as I am working on other disassemblies as well 🙂.

This release is pixel perfect and it runs with an internal resolution of 480x272, fitting perfectly for the 960x544 of the PS Vita!

Installation guide

Download the APK from the Play Store of Sonic the Hedgehog 1 and 2 (links below), rename the extension from APK to ZIP. Extract the content, go to the folder asset where you will find a file called Data.rsdk.xmf, that you have to rename to Data.rsdk. With VitaShell, place the file in ux0:data/Sonic1 and ux0:data/Sonic2. Have fun ✌

Known issues

Sometimes you will notice glitches at the bottom of the screen (eg. title screen). This is perfectly normal as the game is rendering at 480x272 rather than 416x240. It was the only way to achieve pixel perfect resolution.

Special stages are S L O W. You might want to overclock your PS Vita just for them.

Occasional slowdowns when the music changes or when some sound effects are played.