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Sonic the Hedgehog |
| USA's Original Release Date: October 25, 1991 (Master System), December 1991 (Game Gear) | |
| Japan's Original Release Date: December 28, 1991 (Game Gear) | |
| Europe's Original Release Date: October 25, 1991 (Master System), December 1991 (Game Gear) | |
| Original Platform: Master System/Game Gear | |
| Mode: Single Player | |
| Genre: Platformer | |
| Developer: Ancient | |
| Publisher: Sega | |
| Composer: Masato Nakamura, Yuzo Koshiro | |
| Media: Cartridge | |
| Latest Rating: E/3+/G/A | |
Game Genie Codes
Version 1 | 007-01A-3BE: | Unlimited lives |
| 020-54A-E6E: | Rings worth 2 points However, the ring counter will return to zero after 100 points, but an extra life will be awarded. |
| 030-54A-E6E: | Rings worth 3 points |
| 040-54A-E6E: | Rings worth 4 points |
| 050-54A-E6E: | Rings worth 5 points |
| 060-54A-E6E: | Rings worth 6 points |
| 070-54A-E6E: | Rings worth 7 points |
| 080-54A-E6E: | Rings worth 8 points |
| 3A0-21C-2A2: | Never lose rings |
| 003-F8C-3B7: | Timer disabled |
| 013-7DE-E66: | Start with 1 life |
| 053-7DE-E66: | Start with 5 lives |
| 093-7DE-E66: | Start with 9 lives |
Version 2
| 003-8CE-5D4 013-88E-91A |
Start on Green Hill Zone, Act 2 |
| 003-8CE-5D4 023-88E-91A |
Start on Green Hill Zone, Act 3 |
| 003-8CE-5D4 033-88E-91A |
Start on Bridge Zone, Act 1 |
| 003-8CE-5D4 043-88E-91A |
Start on Bridge Zone, Act 2 |
| 003-8CE-5D4 053-88E-91A |
Start on Bridge Zone, Act 3 |
| 003-8CE-5D4 063-88E-91A |
Start on Jungle Zone, Act 1 |
| 070-54A-E6E: | Rings worth 7 points |
| 003-8CE-5D4 073-88E-91A |
Start on Jungle Zone, Act 2 |
| 003-8CE-5D4 083-88E-91A |
Start on Jungle Zone, Act 3 |
| 003-8CE-5D4 093-88E-91A |
Start on Labyrinth Zone, Act 1 |
| 003-8CE-5D4 0A3-88E-91A |
Start on Labyrinth Zone, Act 2 |
| 003-8CE-5D4 0B3-88E-91A |
Start on Labyrinth Zone, Act 3 |
| 003-8CE-5D4 0C3-88E-91A |
Start on Scrap Brain Zone, Act 1 |
| 003-8CE-5D4 0D3-88E-91A |
Start on Scrap Brain Zone, Act 2 |
| 003-8CE-5D4 0E3-88E-91A |
Start on Scrap Brain Zone, Act 3 |
| 003-8CE-5D4 0F3-88E-91A |
Start on Sky Base Zone, Act 1 |
| 2A2-86A-6E2: | Breathe underwater |