If you wanted to play this one before present day in the USA, you would have had to import it from Japan or Europe, or have downloaded it through the short-lived SEGA Channel service. But, unfortunately, it was even more obscure in its original release – whereas Gunstar was tough to find in the States in cartridge form, Alien Soldier was nearly impossible to track down thanks to its lack of an official American release. It was also developed by Treasure, so it was a follow-up to Gunstar in many ways. This game is part of a large collection of Mega Drive games in The Strong's collection that represent nearly 100% of all games released for that system.This is a game that plays very much like Gunstar Heroes, and finds appeal in much the same way – it's a side-scrolling action/shooter with tons of explosions, enemies, weapon types and maneuvers, and lots and lots of huge, impressive bosses to face off against. Mega Drive games also received re-release as part of collector's editions for the Sony PS2 and PSP, and other systems, as well as being available for download on the Nintendo Wii Virtual Console.

Games continued to be released internationally as recently as 2002. The first successful 16-bit system, the Mega Drive's 14-year lifespan places it second only to the Nintendo Game Boy. With seven distinct versions, it also has the largest number of licensed versions of any console. The Mega Drive/Genesis also supported a number of add-on components (32X, CD, Power Base Converter), making it one of the most flexible systems ever developed. The Genesis could do things that the NES simply couldn't. Sega also focused attention on its better graphics, speed, and sound, especially after the release of Sonic. These efforts were often successful, as Sega marketed the Genesis as hip, cool, and edgy. In addition to porting over popular coin-op games, Sega executives worked hard to lure developers away from Nintendo.

Dubbed the Genesis, this version was developed with the American market and consumer in mind. A year later, Sega released the Mega Drive in the United States. Released in 1988, the Sega Mega Drive heralded the coming of the 16-bit era and inaugurated the Console Wars of the 1990s.

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