"Thunder Force II is a scrolling shooter developed by Technosoft. It was first released in Japan in 1988 for the Sharp X68000 computer. A year later, it was ported to the Sega Mega Drive/Genesis game console and released in Japan (under the name Thunder Force II MD), Europe, and the United States. It is the second chapter of the Thunder Force series." Source: Wikipedia, "http://en.wikipedia.org/wiki/Thunder_Force_II," available under the CC-BY-SA License.