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Play Mystery Quest (US edition · English) Online
Mystery Quest
Play Mystery Quest online as Hao. Explore four castles, find hidden talismans and keys, and use magic shots and special equipment to uncover the way forward.
Browser play
Nintendo Entertainment System (NES) / Famicom — EmulatorJS controls
Default Player 1 keyboard mapping. Change keys in Controller Settings.
| Console button | Keyboard |
|---|---|
| ↑ / ↓ / ← / → | ↑ / ↓ / ← / → |
| A / B | Z / X |
| START / SELECT | Enter / V |
Open Controller Settings to configure your keyboard or gamepad. Touch controls are available on mobile.
How to Play Mystery Quest
Quick start
Press START during the demonstration to reach the game screen, then START again to begin. Move Hao with Left/Right, jump with A and fire with B. Search the first castle carefully instead of walking straight past it: stand at a door and press Up to enter, look for keys when a door shows a key symbol, and shoot suspicious blocks. Pick up vitality stars and keep away from deep water unless you have an SOS raft.
Controls
Left/Right: move. Up: enter a doorway. Down: duck or climb down where applicable. A: jump. B: fire. START: advance from the demonstration, begin the game, and pause/resume during play. Keys and special equipment affect which doors and blocks you can pass; they are not separate attack-button moves.
Mystery Quest — About this game
Mystery Quest combines side-scrolling platforming with a search through four castles and their underground passages. Hao, a young magician proving himself to his master, must find the hidden talismans needed to complete his journey. Doors can lead across walls into another part of a maze, while certain blocks disappear when shot or struck with the right equipment. Keys and magical items open possibilities that are easy to miss on a first visit. The power boots and helmet help break blocks, a scroll strengthens your shots, and stars restore a little vitality. Exploration also carries risks: skulls and dangerous floors drain energy, and deep water is fatal without the single-use SOS raft. Watch for suspicious scenery, remember where passages lead, and collect the castle’s treasure before heading out.
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 · nes
- 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.