MK2k
I created a PR which introduces parsing of command line arguments and (trying) to load a game with core and system: https://github.com/RetroAchievements/RALibretro/pull/342
Thanks, I'll have a look into that.
> having a node-based CLI interface not requiring a browser engine would be nice... actually it could be an npm package which is then consumed by CLI, WebApp, Electron App...
Stellar installs all cores in one go - handy if you have a fresh RA install
Great to see that such a feature is planned! Would mounting to a folder inside an encrypted system drive also work? For this I assume a certain sequence of mounts...
Settings -> Platform Settings -> Right Click -> Add Platform 
Let me know for which new platform you want to use this feature and if there is something missing for you. Metropolis Launcher can handle its predefined platforms well, but...
Thanks for clearing that up. Yes, you can use custom platforms for that (for now) and I think there is no better option yet. In the future I will introduce...
thanks for your reports, I'll split them up to multiple tickets
https://github.com/theMK2k/MetropolisLauncher/issues/50 https://github.com/theMK2k/MetropolisLauncher/issues/51 https://github.com/theMK2k/MetropolisLauncher/issues/52 https://github.com/theMK2k/MetropolisLauncher/issues/53