@thetechkid said in How do I make game cartridges???:

I want to make an old school game system,

I'd suggest start with getting a Pi and putting RetroPie on it and playing around a bit to get familiar with how things work

and make separate cartridges for it.

This could be accomplished a number of different ways

I know that (after watching someone else's video) that I can just use NFC tags,

just is certainly a loaded term. There is a lot going on with that NFC setup.

but I have no idea how

Figuring this kind of stuff out is where a lot of the fun comes in.

and I don't want to be buying an Arduino as well.

an Arduino may not be required for what you come up with, but it seemed to work well in the mini NES NFC setup you mentioned

Is there a way to have kind of flash drives and make Emulation Station run a game from a flash drive automatically? Thanks in advance.

The NFC chip had the name of the game on it and then a script was running on the Pi to start that game (the game itself wasn't on the cartridge) but I'm not sure what commands the script is kicking off. If it were my project, before I introduced a "cartridge" aspect to it I'd look at ways to kick off an emulator with a specific game independently of the EmulationStation menu.

Dump gameboy image from cartrige directly to pi