sms_sdl (Sega Master System and Game Gear emulator) SMS Plus is Sega Master System and Game Gear emulator. Originally, it was written to run under DOS. Since Charles Mac Donald released his emulator under the GPL terms, this emulator has been ported to different platforms. The sms_sdl.png icon is by finite, from http://www.pixeljoint.com/pixelart/2312.htm