A downloadable game for Windows, macOS, and Linux

I used to be obsessed with old video game ROM hacks and prototypes, especially the Sonic the Hedgehog series. There was something charming, and sometimes unnerving, about seeing familiar zones twisted in odd ways. I'd scroll through obscure forums and FTP sites, always looking for something new.

One day, on a long-dead message board called "BlastEmBeta," I found a thread simply titled:

"Do Not Run hedgehog.avi"

The original post had no text. Just a single MEGA link to a .zip file called sonic1_lostbuild.7z. Against my better judgment, I downloaded it.

Inside the archive was just one file: hedgehog.avi.

No ROM. No README. Just that. An AVI video file, 22.6 MB.

I thought maybe it was footage of a lost prototype or a fanmade animation. I opened it

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Published 2 days ago
StatusReleased
PlatformsWindows, macOS, Linux
AuthorAutoRun_S1
GenrePlatformer
Made withGDevelop
TagsHorror, Sega Genesis
Average sessionA few seconds
LanguagesEnglish

Download

Download
hedgehog.avi video 1 6.2 MB
Download
sonicfreeversion-1_0_0-windows.zip 83 MB
Download
sonicfreeversion-1_0_0-macos.zip 79 MB
Download
sonicfreeversion-1_0_0-linux.AppImage 82 MB
Download
hedgehog.avi video 2 139 MB

Install instructions

extract all the files in order to play the game

Development log