(years later edit: I have genuine hope that 2022 will be the year we ditch Windows. If you don't know enough about computers to figure this out on your own and don't have Windows, then get Windows.

If you aren't on Windows, then you clearly already know enough about computers to not need a guide like this and that means you are awesome. If you installed somewhere else then hopefully you can find where the stuff is.

I am going to assume that you installed on the C: drive on a modern Windows OS like normal. So, how to start playing? Once you've installed RetroArch, you just need to find where the ROM files are at on your hard drive.

When you launch RetroArch for the first time, you will want to set it to full screen, go in to the updates in the menu to get the PicoDrive core, and into the options to set up your controls. Use 7-zip [to unzip it, and then you can make a shortcut to retroarch.exe on your desktop. Try the other one if it doesn't work) and then you'll see the download. Get RetroArch here! [You go to 'Downloads (stable)' in the upper right, then Windows, then 'x86_64' (if you have a 64-bit OS. Just setup your controls once, and you're good to go! But for those who like to tinker, it also comes with all the powerful options you'd expect. There are several great free software, and the way I recommend using it is through RetroArch [RetroArch is a nice front-end that lets you play lots of emulators without needing to reconfigure your options for each one.

Steam sega emulator too small