Sorry for my bad english.
Right now I'm emulating 40 systems on my windows 10 machine using the build in GUIs of the different emulators (Arcade, hbmame, FS-UAE, D-Fend, Citra, Retroarch, PCSX2, Dolphin,...) which works fine, as long as I'm sitting alone in front of my computer with mouse and keyboard.
My plan is to setup RetroFE as frontend with rocketlauncher in the middle to run all of that emulators, so I could sit with friends on the couch, only using the xbox360 controllers to zap through the romsets and explore new interesting games.
I'm not using the hyperlist romsets, because if avaible I prefere German and Europe region ROMs over the US ones and that makes it hard to find artwork and game infos.
I built most of my romsets with clrmamepro based on no-intro parent-clone DATs and G1R1-option active, so only 1 ROM per Game will be kept. The preferred regions are "Ger->Eur->US->Aus->Can->Jap->all other regions", so if a german version is avaible it will keep the german clone and delete the US version etc. If a game wasn't released in europe/us, like many japanese games, 1 version will also be kept.
My games are stored on a usb-hdd like "root\ROMs\SYSTEMNAME\Subfolder" where subfolders are "BIOS" (containing all BIOS-ROMs), "HACK" (containing all hacked and translated ROMs) , "NATIVE" (containing all Ger/Eur/Us/Aus/Can region ROMs) , "FOREIGN" (containing all ROMs not released in German/English and I can not understand) and "SELECTED" (containing various picked out ROMs).
There are often over 1000 ROMs per system, so I don't want to have one big collection per system containing all ROMs.
Instead I want to have these 7 sub-collections per system:
1) "Singleplayer Ger/Eng" -> all singleplayer ROMs in the "NATIVE" subfolder
2) "Multiplayer Ger/Eng" -> all 2+ Player ROMs in the "NATIVE" subfolder
3) "Selected" -> all ROMs in "SELECTED" subfolder
4) "Singleplayer International" -> all singleplayer ROMs in the "FOREIGN" subfolder
5) "Multiplayer International" -> all 2+ Player ROMs in the "FOREIGN" subfolder
6) "Hacks"-> all ROMs in "HACK" subfolder
7) "All" -> all ROMs in the "HACK", "SELECTED", "NATIVE" and "FOREIGN" subfolder (but not the "BIOS" subfolder)
So I can easily select the type of game I'm looking for.
And often I don't want to play a specific game and would like to just select the supported number of players (alone or guests visiting) and the genre and zap through the games.
If no filtering is supported yet, I will try to create genre-playlists for every sub-collection.
Also I wasn't able to find a hyperlist with all no-intro roms nor a crawler script to make my own hyperlist-db-file.
So I'm considering to code my own crawler to generate complete international hyperlists and genre-playlists.
In short:
I'm just looking for a way to group/filter games by system, genre and number of supported players, so it's easier to find what I'm looking for.