Master System

Alien Syndrome

Alien Syndrome is a scrolling shooter arcade conversion. Your job is to run around and rescue all the captives and make it to the escape hatch before the time bomb explodes. Then face the mother alien at the end of the level. You can play as a single player or two people, taking turns. (Player 2 starts the game after Player 1 dies and vice versa.)

Genre: Shooter
Year: 1988
Developer: SEGA Enterprises Ltd.
Publisher: SEGA of America, Inc.
Players: 2

Get Etera

P2P Netplay available on compatible cores

Achievements

39 achievements · 640 total points

Calliope Clear Defeat Squime and clear Round 1
5 pts
Calliope Collector Get All 17 Items in Calliope
10 pts
Calliope Hostage Rescuer Save all 12 Hostages in Calliope
10 pts
In Space no one can hear a Squime Defeat The Stage 1 Boss without Dying
25 pts
Clio Clear Defeat Aargh and clear Round 2
5 pts
Clio Collector Get All 13 Items in Clio
10 pts
Clio Hostage Rescuer Save all 12 Hostages in Clio
10 pts
Aarghin' Through Defeat The Stage 2 Boss without Dying
25 pts
Erato Clear Defeat Tacapy and clear Round 3
5 pts
Erato Collector Get All 15 Items in Erato
10 pts
Erato Hostage Rescuer Save all 12 Hostages in Erato
10 pts
Fit to Print but Not Tacapy Defeat The Stage 3 Boss without Dying
25 pts
Euterpe Clear Defeat Masher and clear Round 4
5 pts
Euterpe Collector Get All 12 Items in Euterpe
10 pts
Euterpe Hostage Rescuer Save all 12 Hostages in Euterpe
10 pts
Mashed Masher Defeat The Stage 4 Boss without Dying
25 pts
Melpomene Clear Defeat Haggah and clear Round 5
5 pts
Melpomene Collector Get All 13 Items in Melpomene
10 pts
Melpomene Hostage Rescuer Save all 12 Hostages in Melpomene
10 pts
The Last Haggah Defeat The Stage 5 Boss without Dying
25 pts
Thalia Clear Defeat Minosar and clear Round 6
5 pts
Thalia Collector Get All 14 Items in Thalia
10 pts
Thalia Hostage Rescuer Save all 12 Hostages in Thalia
10 pts
Minosar is Wrecked Defeat The Stage 6 Boss without Dying
25 pts
Urania Clear Defeat Mr. Mimi and clear the final round
10 pts
Mr. Mimi is no Meanie Defeat The Stage 7 Boss without Dying
25 pts
Yellows before Fellows Save the 2 Yellow Hostages in Erato First
10 pts
Minosar meets The Wall Attack Minosar with your body and Invincible [PowerUp] [no shooting]
25 pts
Extended Invincibility I Maintain invincibility Powerup continuously while collecting 3 [?] in stage 1
25 pts
Extended Invincibility II Maintain invincibility Powerup continuously while collecting 3 [?] in stage 2
25 pts
Extended Invincibility III Maintain invincibility Powerup continuously while collecting 3 [?] in stage 3
25 pts
Extended Invincibility IV Maintain invincibility Powerup continuously while collecting 4 [?] in stage 4
25 pts
Extended Invincibility V Maintain invincibility Powerup continuously while collecting 3 [?] in stage 5
25 pts
Extended Invincibility VI Maintain invincibility Powerup continuously while collecting 4 [?] in stage 6
25 pts
Invincibility [?] Expert I Obtain the Invincibility [?] Power Up 5 Times
10 pts
Invincibility [?] Expert II Obtain the Invincibility [?] Power Up 10 Times
10 pts
Invincibility [?] Expert III Obtain the Invincibility [?] Power Up 20 Times
25 pts
High Scorer Score 250K Points
25 pts
No Station for Aliens Clear the game without Dying
50 pts

Alien Syndrome leaderboard

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Alien Syndrome frequently asked questions

How do I play Alien Syndrome online with a friend?

Alien Syndrome (Master System) can be played online with friends using Etera's P2P netplay. Create a room in the launcher and invite your friend, who joins through the invite. Step by step:

Download the Etera launcher for Windows or Linux and create your account.
Ask your friend to do the same and add them to your friends list.
Pick the game in the library and create a netplay room.
Invite your friend: they accept the invite and join the room.
The launcher keeps dependencies on the same version for both players, avoiding desync.

How do I play Alien Syndrome on PC?

Download the Etera launcher (Windows or Linux), find Alien Syndrome in the Master System library and click to download. The launcher handles the emulator and setup for you.

Does Alien Syndrome netplay lag?

Etera uses a direct P2P connection between players, which usually means low latency. Results depend on each player's internet quality.

Does Alien Syndrome have achievements?

Yes, Alien Syndrome has 39 achievements worth 640 points. Achievements are counted and saved to your history and the leaderboard for subscribers and during the trial period.

Can I play Alien Syndrome for free?

Yes. Every account gets a 5-day trial with premium features. After that, the free plan allows 3 new games per day and 1 netplay session per day. Premium raises those limits.

Play Alien Syndrome on Etera

Download the launcher for Windows or Linux, find this game in the library and play solo or with friends.