System name:
megacdjp

Full system name:
Sega Mega-CD

Supported file extensions:
.68k .68K .bin .BIN .bms .BMS .chd .CHD .cue .CUE .gen .GEN .gg .GG .iso .ISO .m3u .M3U .md .MD .mdx .MDX .sg .SG .sgd .SGD .smd .SMD .sms .SMS .7z .7Z .zip .ZIP

Launch command:
%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\genesis_plus_gx_libretro.dll %ROM%

Alternative launch commands:
%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\genesis_plus_gx_wide_libretro.dll %ROM%
%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\picodrive_libretro.dll %ROM%
%EMULATOR_ARES% --fullscreen --system "Mega CD" %ROM%

Platform (for scraping):
segacd

Theme folder:
megacdjp