Ah, yes, my favorite classic game - Error. Unable to load information about this item.

smh forgot the mega man legacy collections

Forgot the Castlevania collection and MGS 1-3 which is a scam from Konami

do you need to find the bios for playstation or is it included?

Thanks bro

https://store.steampowered.com/app/2301590/Magic_and_Legend__Time_Knights/
ROM included for three systems (Gameboy, Gameboy Color, and one I never heard of).

https://store.steampowered.com/app/2462580/Fista_3in1_Retro_Pack_Carpet_Shark_Plummet_Challenge_Game__The_Arm_Wrestling_Classic/ comes with 3 nes roms

dont forget the many gameboy games on itch.io

New NES game on Steam, and it is free: https://store.steampowered.com/app/2435230/Space_Mutants/

@Discoverypark I disagree. Even if the game isn't for sale any more it's a helpful list to those who do own the games. It wouldn't hurt to update the guide to say they are delisted though.

@freizumi Some are already named correctly. Others aren't. For example, most games published by Piko Interactive are a file called game (no file extension). It'll need to be renamed with an extension such as .nes, .sfc, or .md. But to fully answer, RetroArch does not know these files are on your PC. The ROMs are loose files in the game's directories that you'll need to copy and paste to your ROM folders or browse to them each time. That or if you only have something like the Sega Genesis games you could setup the start folder in RetroArch to start there.