Is the game data actually in the portmaster directory when you browse the SD card on a PC? I know many pm games require copyrighted data to run (half life for example)

A lot of these stock OSes are crudely translated from Chinese perhaps “ready to play” isn’t literal.

I’ve gotten several portmaster games working on ArkOS on my Anbernic devices, check their wiki it’s probably similar to the setup required on the anbernic stock OS