http://en.wikipedia.org/wiki/Metal_Slug_series

Metal Slug is a series of run and gun video games first released on Neo-Geo arcade machines and game consoles created by SNK. It was also ported to other consoles, such as the Sega Saturn, the PlayStation, the Neo-Geo Pocket Color and more recently, the Game Boy Advance, PlayStation 2 and Xbox. There is also an anthology of the first 7 games in the main series (including Metal Slug X) available for the Wii, PlayStation Portable, and PlayStation 2.

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