This outlines how to add support for many different systems into EmulationStation through configuration of es_systems.cfg.
<system>
<name>mame</name>
<fullname>Multiple Arcade Machine Emulator</fullname>
<path>~/.emulationstation/roms/mame/</path>
<extension>.zip .chd</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/mame_libretro.so %ROM%</command>
<platform>mame</platform>
<theme>mame</theme>
</system> <system>
<name>neogeo</name>
<fullname>Neo Geo</fullname>
<path>~/.emulationstation/roms/neogeo/</path>
<extension>.zip</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/fbneo_libretro.so %ROM%</command>
<platform>neogeo</platform>
<theme>neogeo</theme>
</system> <system>
<name>nes</name>
<fullname>Nintendo Entertainment System</fullname>
<path>~/.emulationstation/roms/nes/</path>
<extension>.zip .nes .smc .sfc .fig .swc .mgd</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/nestopia_libretro.so %ROM%</command>
<platform>nes</platform>
<theme>nes</theme>
</system> <system>
<name>snes</name>
<fullname>Super Nintendo Entertainment System</fullname>
<path>~/.emulationstation/roms/snes/</path>
<extension>.zip .smc .sfc .fig .swc</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/snes9x_libretro.so %ROM%</command>
<platform>snes</platform>
<theme>snes</theme>
</system> <system>
<name>n64</name>
<fullname>Nintendo 64</fullname>
<path>~/.emulationstation/roms/n64/</path>
<extension>.v64 .zip .n64 .z64 .bin</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/mupen64plus_next_libretro.so %ROM%</command>
<platform>n64</platform>
<theme>n64</theme>
</system> <system>
<name>nds</name>
<fullname>Nintendo DS</fullname>
<path>~/.emulationstation/roms/nds</path>
<extension>.nds .bin .7z</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/desmume_libretro.so %ROM%</command>
<platform>nds</platform>
<theme>nds</theme>
</system> <system>
<name>gc</name>
<fullname>Nintendo Gamecube</fullname>
<path>~/.emulationstation/roms/gc/</path>
<extension>.iso .zip .elf .dol .wad .gcm</extension>
<command>dolphin-emu -b --exec %ROM%</command>
<platform>gc</platform>
<theme>gc</theme>
<!-- For running properly, the Dolphin core requires to have the Dolphin Sys folder in the proper location. After downloading the core within RetroArch, execute the following steps: "https://docs.libretro.com/library/dolphin/" -->
</system> <system>
<name>gb</name>
<fullname>Game Boy</fullname>
<path>~/.emulationstation/roms/gb/</path>
<extension>.gb .zip</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/gambatte_libretro.so %ROM%</command>
<platform>gb</platform>
<theme>gb</theme>
</system> <system>
<name>gbc</name>
<fullname>Game Boy Color</fullname>
<path>~/.emulationstation/roms/gbc/</path>
<extension>.gbc .zip</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/gambatte_libretro.so %ROM%</command>
<platform>gbc</platform>
<theme>gbc</theme>
</system> <system>
<name>gba</name>
<fullname>Game Boy Advance</fullname>
<path>~/.emulationstation/roms/gba/</path>
<extension>.gba .zip</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/mgba_libretro.so %ROM%</command>
<platform>gba</platform>
<theme>gba</theme>
</system> <system>
<name>genesis</name>
<fullname>Sega Genesis</fullname>
<path>~/.emulationstation/roms/genesis/</path>
<extension>.smd .bin .gen .md .sg .zip</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/genesis_plus_gx_libretro.so %ROM%</command>
<platform>genesis</platform>
<theme>genesis</theme>
</system> <system>
<name>megadrive</name>
<fullname>Sega Mega Drive</fullname>
<path>~/.emulationstation/roms/megadrive/</path>
<extension>.smd .bin .gen .md .sg .zip</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/genesis_plus_gx_libretro.so %ROM%</command>
<platform>megadrive</platform>
<theme>megadrive</theme>
</system> <system>
<name>mastersystem</name>
<fullname>Sega Master System</fullname>
<path>~/.emulationstation/roms/mastersystem/</path>
<extension>.sms</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/genesis_plus_gx_libretro.so %ROM%</command>
<platform>mastersystem</platform>
<theme>mastersystem</theme>
</system> <system>
<name>gamegear</name>
<fullname>Sega Game Gear</fullname>
<path>~/.emulationstation/roms/gamegear/</path>
<extension>.gg</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/genesis_plus_gx_libretro.so %ROM%</command>
<platform>gamegear</platform>
<theme>gamegear</theme>
</system> <system>
<name>segacd</name>
<fullname>Sega CD</fullname>
<path>~/.emulationstation/roms/segacd/</path>
<extension>.cue .iso</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/genesis_plus_gx_libretro.so %ROM%</command>
<platform>segacd</platform>
<theme>segacd</theme>
</system> <system>
<name>sega32x</name>
<fullname>Sega 32X</fullname>
<path>~/.emulationstation/roms/sega32x/</path>
<extension>.32x .smd .bin .md .zip</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/picodrive_libretro.so %ROM%</command>
<platform>sega32x</platform>
<theme>sega32x</theme>
</system> <system>
<name>saturn</name>
<fullname>Sega Saturn</fullname>
<path>~/.emulationstation/roms/saturn/</path>
<extension>.cue .nrg .zip .bin .iso .mdf</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/mednafen_saturn_libretro.so %ROM%</command>
<platform>saturn</platform>
<theme>saturn</theme>
</system> <system>
<name>dreamcast</name>
<fullname>Sega Dreamcast</fullname>
<path>~/.emulationstation/roms/dreamcast/</path>
<extension>.cdi .gdi</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/flycast_libretro.so %ROM%</command>
<platform>dreamcast</platform>
<theme>dreamcast</theme>
</system> <system>
<name>psx</name>
<fullname>PlayStation</fullname>
<path>~/.emulationstation/roms/psx/</path>
<extension>.cue .cbn .img .iso .m3u .mdf .pbp .toc .z .znx .PBP</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/mednafen_psx_hw_libretro.so %ROM%</command>
<platform>psx</platform>
<theme>psx</theme>
<!-- For running properly you should have these "scph5500.bin","scph5501.bin" and "scph5502.bin" BIOS files placed into the ‘system’ folder of Retroarch "~/.config/retroarch/system/" and roms directory. Required to make games work -->
</system> <system>
<name>ps2</name>
<fullname>PlayStation 2</fullname>
<path>~/.emulationstation/roms/ps2/</path>
<extension>.iso .img .bin .mdf .z .z2 .bz2 .dump .cso .ima .gz</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/play_libretro.so %ROM%</command>
<platform>ps2</platform>
<theme>ps2</theme>
</system> <system>
<name>psp</name>
<fullname>PSP</fullname>
<path>~/.emulationstation/roms/psp/</path>
<extension>.cso .iso .pbp .PBP</extension>
<command>retroarch -f -L ~/.config/retroarch/cores/ppsspp_libretro.so %ROM%</command>
<platform>psp</platform>
<theme>psp</theme>
<!-- The PPSSPP core requires assets files to be fully functional. Assets such as fonts and backgrounds that are required for memory card screens. You can simply follow this tutorial at "https://docs.libretro.com/library/ppsspp/" -->
</system>