A simple tool that allows you to download various game ports that are available for 351Elec/AmberElec, ArkOS, JelOS, RetroOZ, TheRA, and UnofficialOS for the RK3326 and RK3566 devices and the RG552.
Why do you think that https://github.com/AM2R-Community-Developers/AM2R-Community-Updates is a good alternative to PortMaster