Original Mode with levels and músics of Sonic 1 The rings counter is not reset between acts
Support for SRAM, which allows save the game and the Time Attack Sound driver for PCM musics, single music of the game in PCM is the number B7 in the sound test, Canterbury Plains of Top Gear 2 New songs, including one for each boss, act and special stage Mode 'ITEM S ONLY', where all monitors become monitors of the type 'S'
Monitors 'S' and monitors Eggman reprogrammed, now monitors Eggman cause damages and monitors 'S' transforms the character in Hyper and add 50 rings The transformations of Super and Hyper is accessible for both characters
You can play with the Sonic or with the Tails, each with their own skills Sonic The Hedgehog Open Source Project (STHOSP) is a ROM hack of Sonic 1 for Sega Mega Drive with open source code that I've done, the hack has several new features in relation the original game:
