This is a hack of Sonic the Hedgehog for the Sega Genesis. It alters the palette and layouts of each level. It is designed to be harder than the original game. There aren't many complete level layout hacks for this game so give this hack a try.
The patch is in xdelta format. The ROM should be in BIN format.
Sonic 1 The Blue Blur
Credits: Schwa
Sonic 1 The Blue Blur is a hack of Sonic the Hedgehog for the Sega Mega Drive/Genesis. It gives each Zone totally new palettes and layouts, with the latter designed to be more difficult than those of the original game.
Sonic The Hedgehog (USA_ Europe).md - NOINTRO
CRC32: F9394E97
MD5: 1BC674BE034E43C96B86487AC69D9293
SHA-1: 6DDB7DE1E17E7F6CDB88927BD906352030DAA194
SHA-256: 46160BAA06362C711C9F1A5017CB7371026444936C8AF5E93A78996CF32FF2A6