Sonic 1 Hyper Edition is a ROM hack of the original Sonic the Hedgehog for the Sega Genesis. Details on this hack are scarce, but the name suggests a focus on enhancing speed and challenge.  It's likely a modification of levels, enemy placement, or potentially even new levels added to the original game.  The creators are unknown but part of the broader community of ROM hackers that create modified versions of classic games for the Sega Genesis. The original game, Sonic the Hedgehog, is a highly influential platform game originally released in 1991 by Sega.

Sonic 1 Hyper Edition

Sonic 1 Hard Bosses