Uploaded September 2021 | Updated September 2026, 2 weeks ago

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This is a hack by Editchris with a lot of interesting features (and annoying bosses for the most part), such as new layouts, new moves, and new songs taken from various public sources (in fact, several of those songs have been converted by me and other people from SSRG).

Read more: info.sonicretro.org/Sonic_1_Special_Version

For reference, I'm playing version 5.5 here.