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Play Alien Syndrome (Japan edition · English) Online
Alien Syndrome
Play Alien Syndrome for Game Gear online. Rescue captives, navigate alien-filled corridors and use the map to track the exit and remaining time.
Browser play

Sega Game Gear — EmulatorJS controls
Default Player 1 keyboard mapping. Change keys in Controller Settings.
| Console button | Keyboard |
|---|---|
| ↑ / ↓ / ← / → | ↑ / ↓ / ← / → |
| 1 / 2 | X / Z |
| START | Enter |
Open Controller Settings to configure your keyboard or gamepad. Touch controls are available on mobile.
How to Play Alien Syndrome
Quick start
Press START to begin. Move with the directional pad and fire with 1. Open the map with 2 to locate captives and the exit, then return to the action and work through the rescue route. Keep checking the remaining time instead of exploring every corridor at random.
Controls
Directional pad: move. 1: shoot. 2: display the map, showing hostages, exit, lives and time. START: begin the game.
Alien Syndrome — About this game
Alien Syndrome for Game Gear turns a rescue mission into a race through hostile corridors. Move through each ship, shoot the creatures blocking your route and search for the people still held inside. The clock makes wandering costly, so checking the map helps you connect the remaining captives with a practical route to the exit. Button 2 shows the map, including hostages marked in red, the exit, remaining time and lives. Use that information to plan your next stretch rather than clearing passages without a destination. Shooting with button 1 and moving with the directional pad keeps the basic action direct, but successful rescue runs depend on balancing movement, enemy avoidance and the time spent searching.
Alien Syndrome 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 · segaGG
- 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.