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Play Sonic the Hedgehog (US_EU edition) Online
Sonic the Hedgehog
Play Sonic the Hedgehog online on Master System. Collect rings, explore six zones and rescue the animals captured by Dr. Robotnik.
Browser play
Sega Master System — EmulatorJS controls
Default Player 1 keyboard mapping. Change keys in Controller Settings.
| Console button | Keyboard |
|---|---|
| ↑ / ↓ / ← / → | ↑ / ↓ / ← / → |
| 1 / START | X |
| 2 | Z |
Open Controller Settings to configure your keyboard or gamepad. Touch controls are available on mobile.
How to Play Sonic the Hedgehog
Quick start
Press 1 or 2 to view the map, then press again to begin Green Hill. Collect rings early, jump onto robots in ball form and slow down before unfamiliar gaps. Look beyond the fastest route for emeralds.
Controls
Left/right: run; opposite direction: brake; down while moving: roll; up/down while still: look around. 1 or 2: jump and spin attack; hold longer for a higher jump. Console Pause: pause/resume.
Sonic the Hedgehog — About this game
Sonic races through six zones to free his friends from Dr. Robotnik. This Master System adventure combines rolling attacks, measured platform jumps and exploration for hidden Chaos Emeralds. Rings protect Sonic from a hit, but pits and traps still demand care. Each zone changes the terrain, so keeping control of your speed is as useful as building it.
Sonic the Hedgehog Game manuals
Cheats
No cheats have been added for this edition.
Player verification and sources
Browser play was reviewed before this edition was published in the catalogue. The date below is the catalogue publication date, not the game’s original release date.
- Browser test and catalogue publication date
- Browsers and devices
- PC: Chrome, Edge and Firefox. Mobile: Chrome on Android and Safari on iPhone and iPad.
- Player engine and core
- EmulatorJS 4.3.0-pre · segaMS
- Tested by
- rwEmulator
Sources and editorial basis
rwEmulator reviews edition metadata, release information, game manuals and first-hand browser-play notes. Available manuals are linked below; the editorial policy explains how facts are checked and corrections are handled.