Sonic Liberado [ntsc][pal][iso] Direct
A popular variant of "liberado" ISOs allows players to enjoy the Japanese/European soundtrack while playing the English-localized (NTSC-U) version of the game.
For a modern experience without needing ISO patches, you might consider Sonic Origins or the Sonic CD Decompilation project, both of which offer widescreen support and selectable soundtracks by default. Sonic liberado [NTSC][PAL][ISO]
Originally released in . The "Liberado" versions are community-patched "scene" releases. A popular variant of "liberado" ISOs allows players
Sega CD (Mega-CD), and modern emulators like Kega Fusion or RetroArch. Sonic liberado [NTSC][PAL][ISO]