Game Gear
Sonic The Hedgehog (Japan, Europe, Brazil) (Rev 1) Sonic The Hedgehog (Japan, Europe, Brazil) (Rev 1) Sonic The Hedgehog (U) (V1.1) [!] Sonic the Hedgehog Rev 1 (1991)(Sega)
Languages Size CRC32 Region Serial
English, Japanese 256K D163356E USA, Europe, Japan G-3307 (JPN), G-3334 (JPN, MEISAKU COLLECTION), 2408
by Datel
Standard 
D2D1:06