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Play Alien Syndrome (Japan edition · English) Online
Alien Syndrome
Play Alien Syndrome online on Master System. Search alien ships, rescue hostages and reach the escape hatch in time.
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
Press 1 on pad 1 for one player, or on pad 2 for two players. Search nearby rooms, rescue hostages and remember the route to the hatch. Two players take turns.
Controls
Pad: move. 1: fire/start. 2: view the message screen.
Alien Syndrome — About this game
Ricky and Mary enter seven alien ships to recover the captured crews. Viewed from above, the corridors force you to balance exploration against a ticking clock. Rescue the required hostages and locate the escape hatch, then prepare for the creature guarding the way onward. Weapon pickups change how you handle enemies, while message screens help you keep track of the rescue.
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.