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Play Alien Syndrome (US_EU_BR edition · English · Edition 145330) Online
Alien Syndrome
Play Alien Syndrome for Master System online. Search alien-occupied corridors and rescue captives while fighting off creatures.
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 Alien Syndrome
Quick start
Begin the action, find room to move and practise firing at the first enemies.
Controls
Use directional input to move and the firing action to attack.
Alien Syndrome — About this game
Search alien-occupied corridors and rescue captives while fighting off creatures. The overhead view lets you plan a route through nearby rooms, but enemies can interrupt a direct approach. Remember the passages already visited so that returning toward an exit does not become a blind search. Balance firing with exploration and keep a clear path around the next corner.
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 · 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.