Wonder Boy
A landmark action game for the Sega Master System, Wonder Boy combines tight controls with engaging gameplay. Its enduring appeal lies in the perfect balance of challenge and reward.
- Developer
- SEGA
- Platform
- Master System
- Genre
- Action
- Players
- 2P
- Rating
- 4.7 / 5 (2K)
- Last updated
Wonder Boy Controls — Master System Keyboard Keys
Default keyboard bindings for Wonder Boy on our in-browser Master System emulator. Plug in a USB or Bluetooth gamepad to auto-detect mappings, or rebind any key from the emulator settings menu.
| Keyboard | Console button | Typical use |
|---|---|---|
| ↑ | D-Pad Up | Move up |
| ↓ | D-Pad Down | Move down |
| ← | D-Pad Left | Move left |
| → | D-Pad Right | Move right |
| X | 1 | Primary action (jump / confirm) |
| Z | 2 | Secondary action (attack / cancel) |
| Enter | Pause | Start / Pause |
Rebind any key from the EmulatorJS in-game settings menu (gear icon → Controls). A connected gamepad auto-maps to the same buttons.
Wonder Boy Longplay & Gameplay Videos
Watch a full playthrough of Wonder Boy on Master System before you dive in — recommended for getting a feel for the game's pacing, story beats, and difficulty curve.
Watch longplay on YouTube
"Wonder Boy" Master System longplay
Wonder Boy Cheat Codes
17 community-curated cheats for Wonder Boy. Tick any to activate them automatically when you click "Play with cheats" — or copy a code into your own emulator.
-
Infinite Lives
00C1-430900C0-D7027E5-6CE-5DD -
Freeze Wonder Boy's Jogging Animation
00C1-7013 -
Infinite Red/Yellow Bar
00CC-3611 -
Invincibility + Stone Hammers
00C1-2703 -
Start With Stone Hammers
00C1-2701 -
40 Dolls
00C1-3028 -
Full health meter
00C1-B724 -
Infinite Energy
003-D79-3BE+7E4-B19-3B7 -
Have Skateboard
CDD-43C-F79 -
No Instant Death (From Animals, Fire etc.)
003-AFB-B3A -
Fruits Fully Restore Vitality
9C4-9A9-7FD+644-9B9-6E7
Show 5 more cheats Show fewer
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Enemies Die When They Touch You
010-C2D-F72 -
Jump Height Modifier
021-1DB-E6E -
Jump Higher (Alternate)
001-21B-E66 -
Jump in Mid Air
A61-1AB-7F1+A63-1EB-7F1 -
Enable Level Select
182-1EA-6EA+752-1FA-5DB
External references
Frequently Asked Questions
Who developed Wonder Boy?
Wonder Boy was developed by SEGA, available to play in your browser on RetroGameSpace.
How many players does Wonder Boy support?
Wonder Boy supports up to 2 players, ideal for couch co-op or competitive sessions on the Master System.
What type of game is Wonder Boy?
Wonder Boy is a Action game for the Master System, playable instantly in your browser — no downloads, no installs.
How can I play Wonder Boy for free?
Open this page and click "Play Now" — Wonder Boy runs free in your browser via WebAssembly emulation. No account, no payment, no installer.
Do I need to download anything to play Wonder Boy in the browser?
No. Wonder Boy streams from a public archive into a browser-side Master System emulator. Nothing is installed on your computer.
Can I save my progress in Wonder Boy?
Yes. Save states are stored in your browser (IndexedDB) per game, and you can also use any in-game save the original Master System cartridge supported.
Does Wonder Boy work on mobile devices?
Yes — the Master System emulator runs on iOS Safari and Android Chrome. Touch controls overlay the game; landscape mode is recommended.
Is it legal to play Wonder Boy this way?
RetroGameSpace is a transient caching reverse-proxy and does not host first-party copies of Wonder Boy. Game files are fetched on demand from publicly-accessible archives. You are responsible for compliance with your local laws and the bring-your-own-ROM principle.
