Sonic the Hedgehog is a port of the original Sonic the Hedgehog released for the Sega Mega Drive. It was released to the J2ME mobile environment for use on mobile devices, available under the Sega Mobile banner. Depending on the service provider, the game is either provided as one full game or in two parts as Sonic the Hedgehog Part 1 and Sonic the Hedgehog Part 2. Part 1 only provides the first three levels of the game and Part 2 contains the final levels. The game is a port of the 2005 Sonic Cafe game that was simply named Sonic the Hedgehog.
There has also been a second, not as widely known version the game for Verizon phones, & AT&T Phones that has everything the original version did, although strangely removing all sound effects from the game. The mobile phone version also came bundled with some Panasonic cell phones in Europe and Japan.
Differences from the original Mega Drive version
This port of Sonic the Hedgehog closely mimics the Sega Mega Drive version, but some features have been removed, most notably the Special Stages. Once the player leaps into the Giant Ring, he/she is automatically rewarded with a Chaos Emerald. Enemies no longer release small Animals when defeated. Graphics have also been re-sized and the palette of flowers at Green Hill Zone is different. Several graphics that were unused in Sonic the Hedgehog remain hidden in the port including the famed Marble Zone UFOs. Some of the levels have minor tweaks, such as the removal of a see-saw from the Star Light Zone boss encounter, and the removal of a crusher from the Final Zone boss room.
Despite the numerous removals, some things were added to the game to make it easier, such as unlimited continues and a save feature. A scoring system was also added and the top five scores will be saved, alternately they can be uploaded to an online high score ranking. Three levels of difficulty were also added: very easy, easy and normal. Very easy mode is completely lacking of enemies and only the boss of the Zones are present.
- Cheats Menu: At the main screen, when prompted to press 5 or the center key, press 2, 3 0, 6, 9, and 1 to unlock the cheats menu.
- Music Composed: Masato Nakamura
- Porting: Elliot Sumner, Steven O'Boyle, Ben Smith, Pete McWilliam, Christopher Beckford, TAG
- Design & Production: Craig Howard, Jay Sharples, Phil Gaskell