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aliensyn: MAME ROM Information.


Alien Syndrome (c) 1987 Sega.

The earth command faces a grave crisis. Hideous alien life forms have taken control of Earth's space station and hold its inhabitants hostage. Only 2 brave space troopers step forward to face the challenge. Ricky & Mary must save the hostages and destroy the alien menace once and for all. This overhead shoot'em up game features good graphics & sound as well as simple yet fast gameplay with plenty of weapons to find!


Alien Syndrome was sold in a dedicated cabinet by Sega, but was also sold as a conversion kit by Sun Corporation (licensed from Sega) for the America market only.

Cabinet dimensions : 32,5'' (83cm) Deep x 24'' (63cm) Wide x 73'' (185cm) High.

Cabinet weight : 211 lbs (96 kg).

Sega System 16A hardware

Main CPU : 68000 (@ 10 Mhz)

Sound CPU : Z80 (@ 4 Mhz), N7751 (@ 400 Khz)

Sound Chips : YM2151 (@ 4 Mhz), UPD7759 (@ 640 Khz)

Screen orientation : Horizontal (19'')

Video resolution : 320 x 224 pixels

Screen refresh : 60.00 Hz

Palette colors : 6144

Players : 2

Control : 8-way joystick

Buttons : 1

Note : this game also runs on Sega System 16B hardware.


Released in January 1987.

Donn Nauert holds the record for this game with 2,269,200 points on February 2, 1988.

Soundtrack releases :

After Burner / Sega Game Music Vol.3 [Alfa Records - 28XA-109 - Oct 10, 1987]

Legend of Game Music 2 - Platinum Box [Scitron Digital Contents - SCDC-00473 to 00482 - Jan 18, 2006]


* Hint : Shoot and grab everything as quickly as possible. If you manage to finish a level before the timer reaches 100, you get a 60K bonus.


1. Alien Syndrome (1987)

2. Alien Syndrome (2007, Nintendo Wii, Sony PSP)


Music by : Tohru Nakabayashi


* Consoles :

Sega Master System (1987)

Nintendo Famicom (1988)

Sega Game Gear (1992)

Sony PlayStation 2 (2004, "Sega Ages 2500 Vol. 14 : Alien Syndrome")

Sony PlayStation 3 (2009, Sonic's Ultimate Genesis Collection) [as an unlockable]

* Computers :

Amstrad CPC (1987)

Commodore Amiga (1987)

Atari ST (1987)

Sinclair ZX Spectrum (1988)

Commodore C64 (1988)

Sharp X68000 (1992)

PC [MS-DOS, 5.25'']


Game's rom.

Machine's picture.

MAME Info:

0.33b3 [Mirko Buffoni]

Artwork available


- 6th September 2010: Mr. Do - Alien Syndrome bezel looks amazing, thanks to Kiltron for cleaning, and to CADWeazle and Jcroach for purchasing to scan.

- 0.134u4: Team Japump added clone Alien Syndrome (set 6, Japan, new, System 16B, FD1089A 317-0033). Changed description of clone 'Alien Syndrome (set 1, System 16A, FD1089A 317-0033)' to 'Alien Syndrome (set 1, Japan, old, System 16A, FD1089A 317-0033)'. Renamed (aliensyn1) to (aliensynjo).

- 0.133u1: Renamed (aliensy1) to (aliensyn1), (aliensy2) to (aliensyn2) and (aliensy5) to (aliensyn5)

- 0.127u1: Atari Ace moved FD1089 decryption keys to external files. Added 317-0033.key to clones Alien Syndrome (set 1, System 16A, FD1089A 317-0033), (set 2, System 16A, FD1089A 317-0033) and (set 3, System 16B, FD1089A 317-0033). Added 317-0037.key to clone Alien Syndrome (set 5, System 16A, FD1089B 317-0037).

- 0.122u4: Nicola Salmoria added partial key for clone Alien Syndrome (set 5, System 16A, FD1089B 317-0037).

- 0.119u4: Added clone Alien Syndrome (set 5, System 16A, FD1089B 317-0037).

- 0.113u1: Don Maeby fixed 'Timer' dipswitch in clone Alien Syndrome (set 1).

- 0.107u2: Changed input from 2 to 1 button.

- 0.103u4: Added 2nd button.

- 0.93: Shinobiz fixed Alien Syndrome rom names. Changed description of clone '(set 3, System 16B, FD1089A 317-0033?)' to '(set 3, System 16B, FD1089A 317-0033)'.

- 0.92u1: Nicola Salmoria and Charles MacDonald added complete FD1089A 317-0033 table to Alien Syndrome. Thanks to Steve Ellenoff for lending the Alien Syndrome CPU.

- 0.92: Changed description of clone 'Alien Syndrome (set 3,...)' to '(set 1,...)', '(set 2,...)' to '(set 3,...)' and '((set 4,...)' to '(set 2,...)'. Renamed (aliensyj) to (aliensy1), (aliensya) to (aliensy2) and (aliensyb) to (aliensy3).

- 0.91u2: Fixed cpu2 rom address to $30000.

- 0.90u1: Added partial FD1089A table derived by comparison with the unencrypted versions for Alien Syndrome (set 3 and 4) - Games now playable. Actual working cpu are needed to obtain full tables. Changed description to 'Alien Syndrome (set 1, System 16B, unprotected)' and clones 'Alien Syndrome (set 3, FD1089?)' to 'Alien Syndrome (set 2, System 16B, FD1089A 317-0033?)', 'Alien Syndrome (Japan)' to 'Alien Syndrome (set 3, System16A, FD1089A 317-0033)' and 'Alien Syndrome (set 2)' to 'Alien Syndrome (set 4, System16A, FD1089A 317-0033?)'.

- 0.88u7: Changed description to 'Alien Syndrome (set 1, unprotected)'. Added N7751 (400000 Hz) CPU2 and DAC sound to clones (set 2) and (Japan).

- 0.88u6: Changed description to 'Alien Syndrome (set 3, FD1089?)'. Changed Z80 CPU2 clock speed to 5MHz and palettesize to 6144 colors.

- 0.72u1: Swapped cpu2 roms ($18000, 20000).

- 0.36b15: Added clone Alien Syndrome (Japan).

- 0.36b2: Andrew Prime added clone Alien Syndrome (set 2) and (set 3). Changed parent description to 'Alien Syndrome (set 1)'.

- 0.35b2: uPD7759 support in Alien Syndrome [Howie Cohen].

- 0.33b3: Mirko Buffoni added Alien Syndrome (Sega 1987).


Other Emulators:

* FB Alpha

* System 16

Recommended Games (Aliens):

Heiankyo Alien

Victory Road

Alien Syndrome

Alien Syndrome (Mega-Tech)


SAR - Search and Rescue

Uncle Fester's Quest: The Addams Family (PlayChoice-10)


Alien 3

Alien vs. Predator

Alien Storm

Alien Storm (Mega-Tech)

Space Gun

Mutation Nation

Chaos Heat


Invasion - The Abductors

Alien Front

Romset: 1024 kb / 21 files / 439.1 zip

MAME XML Output:

       <game name="aliensyn" sourcefile="segas16b.c">
              <description>Alien Syndrome (set 4, System 16B, unprotected)</description>
              <rom name="epr-11083.a4" size="32768" crc="cb2ad9b3" sha1="66284b4e1071b3cb4b36960a2dba8949325f9e86" region="maincpu" offset="0"/>
              <rom name="epr-11080.a1" size="32768" crc="fe7378d9" sha1="acfee79e5fe9fdf95926562c02599e96e96f76b5" region="maincpu" offset="1"/>
              <rom name="epr-11084.a5" size="32768" crc="2e1ec7b1" sha1="666a9e402d7d02d74c0a2468853a3843b161c1a2" region="maincpu" offset="10000"/>
              <rom name="epr-11081.a2" size="32768" crc="1308ee63" sha1="36a4c8cf3a310398e264c57c7c6f53c05dbc0108" region="maincpu" offset="10001"/>
              <rom name="epr-11085.a6" size="32768" crc="cff78f39" sha1="78431ce6c03232150a8db15499da9371977b570b" region="maincpu" offset="20000"/>
              <rom name="epr-11082.a3" size="32768" crc="9cdc2a14" sha1="c06693f45675e31d591703c27bb3f6ec02fc1215" region="maincpu" offset="20001"/>
              <rom name="epr-10702.b9" size="65536" crc="393bc813" sha1="672782c8fb2a6e454b27e073acc26130cacf3e50" region="gfx1" offset="0"/>
              <rom name="epr-10703.b10" size="65536" crc="6b6dd9f5" sha1="964409c6630caa13caf7d644d0c6fb071860b61b" region="gfx1" offset="10000"/>
              <rom name="epr-10704.b11" size="65536" crc="911e7ebc" sha1="f03d3d3a09d19f7b705f9cb29f73140a3073463f" region="gfx1" offset="20000"/>
              <rom name="epr-10709.b1" size="65536" crc="addf0a90" sha1="a92c9531f1817763773471ce63f566b9e88360a0" region="gfx2" offset="1"/>
              <rom name="epr-10713.b5" size="65536" crc="ececde3a" sha1="9c12d4665179bf433c42f5ddc8a043ad592aa90e" region="gfx2" offset="0"/>
              <rom name="epr-10710.b2" size="65536" crc="992369eb" sha1="c6796acf6807e9ba4c3d241903653f91adf4764e" region="gfx2" offset="20001"/>
              <rom name="epr-10714.b6" size="65536" crc="91bf42fb" sha1="4b9d3e97768323dee01e92378adafecb26bcc094" region="gfx2" offset="20000"/>
              <rom name="epr-10711.b3" size="65536" crc="29166ef6" sha1="99a7cfd7d811537c821412a320beadb5a9c09af3" region="gfx2" offset="40001"/>
              <rom name="epr-10715.b7" size="65536" crc="a7c57384" sha1="46f8efa691d7bbb0a18119c0ff12cff7c0d129e1" region="gfx2" offset="40000"/>
              <rom name="epr-10712.b4" size="65536" crc="876ad019" sha1="39973ddb5a5746e0e094c759447bff1130c72c84" region="gfx2" offset="60001"/>
              <rom name="epr-10716.b8" size="65536" crc="40ba1d48" sha1="e2d4d2689bb9b9bdc85e7f72a6665e5fd4c583aa" region="gfx2" offset="60000"/>
              <rom name="epr-10723.a7" size="32768" crc="99953526" sha1="4a980370923fd5d3dc9e25d42a032c9e78c7ff47" region="soundcpu" offset="0"/>
              <rom name="epr-10724.a8" size="32768" crc="f971a817" sha1="502c95638e4fd5f87e5fc837cb44b39a5d62f4e4" region="soundcpu" offset="10000"/>
              <rom name="epr-10725.a9" size="32768" crc="6a50e08f" sha1="d34b2ccadb8b07d5ad99cab5c5b5b79642c65574" region="soundcpu" offset="20000"/>
              <rom name="epr-10726.a10" size="32768" crc="d50b7736" sha1="b1f8e3b0cf2ffee5382098100cfabe21b383cd51" region="soundcpu" offset="30000"/>
              <chip type="cpu" tag="maincpu" name="68000" clock="10000000"/>
              <chip type="cpu" tag="soundcpu" name="Z80" clock="5000000"/>
              <chip type="audio" tag="mono" name="Speaker"/>
              <chip type="audio" tag="ymsnd" name="YM2151" clock="4000000"/>
              <chip type="audio" tag="upd" name="UPD7759" clock="640000"/>
              <display tag="screen" type="raster" rotate="0" width="320" height="224" refresh="60.054389" pixclock="6293700" htotal="400" hbend="0" hbstart="320" vtotal="262" vbend="0" vbstart="224" />
              <sound channels="1"/>
              <input players="2" buttons="3" coins="2" service="yes">
                     <control type="joy" ways="8"/>
              <dipswitch name="Unused" tag="DSW2" mask="1">
                     <dipvalue name="Off" value="1" default="yes"/>
                     <dipvalue name="On" value="0"/>
              <dipswitch name="Demo Sounds" tag="DSW2" mask="2">
                     <dipvalue name="Off" value="2"/>
                     <dipvalue name="On" value="0" default="yes"/>
              <dipswitch name="Lives" tag="DSW2" mask="12">
                     <dipvalue name="2" value="8"/>
                     <dipvalue name="3" value="12" default="yes"/>
                     <dipvalue name="4" value="4"/>
                     <dipvalue name="Free Play" value="0"/>
              <dipswitch name="Timer" tag="DSW2" mask="48">
                     <dipvalue name="120" value="0"/>
                     <dipvalue name="130" value="16"/>
                     <dipvalue name="140" value="32"/>
                     <dipvalue name="150" value="48" default="yes"/>
              <dipswitch name="Difficulty" tag="DSW2" mask="192">
                     <dipvalue name="Easy" value="128"/>
                     <dipvalue name="Normal" value="192" default="yes"/>
                     <dipvalue name="Hard" value="64"/>
                     <dipvalue name="Hardest" value="0"/>
              <dipswitch name="Coin A" tag="DSW1" mask="15">
                     <dipvalue name="4 Coins/1 Credit" value="7"/>
                     <dipvalue name="3 Coins/1 Credit" value="8"/>
                     <dipvalue name="2 Coins/1 Credit" value="9"/>
                     <dipvalue name="2 Coins/1 Credit, 5/3, 6/4" value="5"/>
                     <dipvalue name="2 Coins/1 Credit, 4/3" value="4"/>
                     <dipvalue name="1 Coin/1 Credit" value="15" default="yes"/>
                     <dipvalue name="1 Coin/1 Credit, 5/6" value="3"/>
                     <dipvalue name="1 Coin/1 Credit, 4/5" value="2"/>
                     <dipvalue name="1 Coin/1 Credit, 2/3" value="1"/>
                     <dipvalue name="2 Coins/3 Credits" value="6"/>
                     <dipvalue name="1 Coin/2 Credits" value="14"/>
                     <dipvalue name="1 Coin/3 Credits" value="13"/>
                     <dipvalue name="1 Coin/4 Credits" value="12"/>
                     <dipvalue name="1 Coin/5 Credits" value="11"/>
                     <dipvalue name="1 Coin/6 Credits" value="10"/>
                     <dipvalue name="Free Play (if Coin B too) or 1/1" value="0"/>
              <dipswitch name="Coin B" tag="DSW1" mask="240">
                     <dipvalue name="4 Coins/1 Credit" value="112"/>
                     <dipvalue name="3 Coins/1 Credit" value="128"/>
                     <dipvalue name="2 Coins/1 Credit" value="144"/>
                     <dipvalue name="2 Coins/1 Credit, 5/3, 6/4" value="80"/>
                     <dipvalue name="2 Coins/1 Credit, 4/3" value="64"/>
                     <dipvalue name="1 Coin/1 Credit" value="240" default="yes"/>
                     <dipvalue name="1 Coin/1 Credit, 5/6" value="48"/>
                     <dipvalue name="1 Coin/1 Credit, 4/5" value="32"/>
                     <dipvalue name="1 Coin/1 Credit, 2/3" value="16"/>
                     <dipvalue name="2 Coins/3 Credits" value="96"/>
                     <dipvalue name="1 Coin/2 Credits" value="224"/>
                     <dipvalue name="1 Coin/3 Credits" value="208"/>
                     <dipvalue name="1 Coin/4 Credits" value="192"/>
                     <dipvalue name="1 Coin/5 Credits" value="176"/>
                     <dipvalue name="1 Coin/6 Credits" value="160"/>
                     <dipvalue name="Free Play (if Coin A too) or 1/1" value="0"/>
              <driver status="good" emulation="good" color="good" sound="good" graphic="good" savestate="unsupported" palettesize="6144"/>

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