@DominicSD when you select the game it gives you a grey box asking you to press A if you wish change any resolution or emulator settings. If you press A then it should bring you to a menu and a list of emulators to choose from. If you're saying you've already tried Gliden and the others then that's the best the Rp4 can do for now for n64

@quicksilver thank you so much, that's all I needed to know