Alien Storm (Mega Drive)

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For other versions of the game, see Alien Storm.

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AlienStorm MD title.png
Alien Storm
Publisher: Sega
System(s): Sega Mega Drive, Steam
Original system(s): Sega System 18
Genre: Action

Number of players: 1-2
Release Date RRP Code
Sega Mega Drive
¥6,000 G-4048
Sega Mega Drive
$? ?
Sega Mega Drive
Sega Mega Drive
Sega Mega Drive
DM ?
Sega Mega Drive
Sega Mega Drive
$? ?
Sega Mega Drive
R$? ?

$2.99 ?
€1.99 ? ?

Wii Virtual Console
600 pts ?
Wii Virtual Console
800 pts ?
Wii Virtual Console
800 pts ?

Alien Storm (エイリアンストーム) for the Sega Mega Drive is an interpretation of the 1990 Sega System 18 game, Alien Storm.

Unlike other ports of the game, the Mega Drive version overhauls virtually all of the levels from the arcade game, while also changing graphical elements so that the game is more suited to the Mega Drive's hardware. Though the game plays almost identically (save for differing enemy placements and tweaks), it is shorter in length, and drops some audio tracks in favour of brand new ones presumably to fit the new levels. The changes are not as distinct as those found in other early arcade-to-Mega Drive conversions, namely ESWAT: City Under Siege or Shadow Dancer: The Secret of Shinobi, but they are significant enough for it to be classed as a different Alien Storm game.


Gameplay is virtually identical to the arcade version of Alien Storm. The mixture of brawler gameplay and first person sections, as well as the limited amount of weapon energy available, sets these games apart from the competition and similar inhouse games. Health restoring items are very sparse and given out randomly during first person sections.

This version also features two additional modes: The Duel, similar to the mode of the same name seen on Golden Axe, where you face off against multiple rounds of enemies in one go, and a versus mode, where two players can face off one on one. Strangely, The Duel can only be selected if there is one controller plugged in, which means it's inaccessible on emulators or official versions that are permanently set to have two controllers plugged in, such as the Steam version.

Brawler sections

A damages all enemies on screen but consumes a big amount of weapon energy. B is a standard weapon attack that can be chained. It consumes a bit of weapon energy. C makes the character dash. Double tapping a direction is for running. Attacking with B while running or dashing consumes no weapon energy. If you keep holding the forward direction during dash attack then the character will go through the enemies, otherwise the character will stop on the first alien he/she hits. C while running makes your character jump. You can do overhead attack while jumping.

First person sections

B is used for shooting.



This version of the game was included in Mega Games 3 and Mega Games 6 Vol. 2. It was also rereleased for the Wii's Virtual Console service in 2007/2008, and was also bundled as part of Sega Mega Drive Ultimate Collection for the PlayStation 3/Xbox 360.


The game is identical in all regions and not region protected.

Production credits

Mega Drive version

Source: In-game credits

Digital manuals

Magazine articles

Main article: Alien Storm (Mega Drive)/Magazine articles.

Physical scans

Mega Drive version

Sega Retro Average 
Publication Score Source
70 №48, p60-61[4]
90 №1, p90-91[5]
78 №118, p52-54[6]
70 №25, p22[7]
75 №1, p18Media:MeanMachinesEssentialSegaGuide Book UK.pdf[8]
96 №24, p46[9]
62 №13
84 №1, p62-64[10]
84 №19, p131
46 №5, p90
50 №9, p19
78 №1, p76[11]
71 №11, p68-70[12]
92 №13, p56-57[13]
73 №10/91, p146
88 №12, p34[14]
83 №23, p40
60 №23, p52
79 №1, p19[15]
74 №18, p64
90 №93, p76[16]
76 №2/91, p85[17]
Sega Mega Drive
Based on
23 reviews

Mega Drive, US
AStorm md us cover.jpg
AStorm md us cart.jpg
Alienstorm md us manual.pdf
Mega Drive, EU
AStorm md eu cover.jpg
AStorm md eu cart.jpg
Mega Drive, JP
AStorm md jp cover.jpg
AlienStorm MD JP CartTop.jpg
AStorm md jp cart.jpg
Alienstorm md jp manual.pdf
Mega Drive, AU

Mega Drive, BR
Alienstorm md br cover.jpg
AlienStorm MD BR Cart.jpg
Alienstorm md br manual.pdf

Mega-Tech version

AlienStorm MT cover.jpg

Technical information

ROM dump status

System Hash Size Build Date Source Comments
Sega Mega Drive
CRC32 f5ac8de5
MD5 b63052973d5d550087d6b36ce8487fb1
SHA-1 e4f8774c5f96db76a781c31476d06203ec16811a
512kB 1991-06 Cartridge

External links