It's possible, and madmonkey's release of RetroArch had shortcuts for NES, SNES and MegaDrive cores. You can write bash script that launches RetroArch with specific core and ROM file, and then just replace kachikachi (Exec=…) path in the .desktop file. It's very easy to do, but considering that Hakchi2 currently overwrites .desktop file, it's too much of a hassle. That's why I went with RetroArch GUI. So, if someone is still interested in RetroArch, I've made a new pack (and removed the previous one from my Google Drive). Now the game ID is a little more meaningful (CLV-H-RARCH), and all RetroArch files are in /games/[Game ID]/libretro instead of /games/[Game ID]/etc/libretro. Also I've added .desktop_temp file in the "game" folder and few lines to the init script that remove automatically generated .desktop file and replace it with the temp one. This is basically a quick hack meant to bypass Hakchi2's .desktop generation. https://drive.google.com/open?id=0ByJabzdhjqvQdC1aZ19NTWgzY1k You can download other cores directly from LibRetro's BuildBot How to use this: 1. Extract archive contents to Hakchi2 folder, agree to replace init file 2. Copy additional cores to games/CLV-H-RARCH/libretro/core (not necessary) 3. Copy ROMs to games/CLV-H-RARCH/libretro/roms 4. Open Hakchi2, enable RetroArch 5. If you need folders, clone and build Hakchi2 from GitHub, then make sure to enable "Settings -> "Pages/folders structure" -> "Custom - show Folders Manager every time" 6. Synchronize. Make sure to move RetroArch to the root folder if you enabled custom folders in the previous step. 7. That's it. As always, thanks to madmonkey for the RetroArch binary and Cluster for a very convenient Hakchi2.