Mame4droid Emulator issue!!!

[Canonen]

Hi I am using Mame4droid Emulator on my android device to play arcade games like Contra, Metal slug, Mario, etc. But when I try to open the emulator and select the game emulator says this file is not a complete set please download the complete set of this game and try again and I have search a lot on net for this to fix it but I didn't get anything useful can someone help me to fix it.

[pix07]

Why not use retroarch?

You just select core and open rom.

Sometimes you need bios so you put it in retroarch folder.

You choose show hiden files or folders.

https://www.retrogamesaddict.com/how-to-setup-and-play-arcade-games-on-retroarch/