So for those who been playing hacks for a long time such as myself, then this is a no brainer, but for those who may have never heard about this,
Sonic 1 Megamix or just
Sonic megamix as called by most of everyone else is one of the first big
sonic hacks Created By Team Megamix that's been around for years now (est.2005) and was one of the first
sonic hacks back then that had went through a major technical overhaul both Visually and physically as they eventually ported it over to the sega cd. iIt was also one of the first hacks ever to feature characters aside from
sonic that consisted of both Mighty the armadillo and what most back then would have never expected back then but shadow the hedgehog as a playable character as well. If you play hacks and haven't tried this yet, I highly recommend this as it's not only a classic but it's just fun. More Info can be seen here along with the download as well
http://info.sonicretro.org/Sonic_the_Hedgehog_Megamix