We have dedicated tags for retro consoles, I recommend using them when possible. For example:
- https://itch.io/games/tag-gameboy-rom
- https://itch.io/games/tag-nes-rom
- https://itch.io/games/tag-commodore-64
- https://itch.io/games/tag-zx-spectrum
They aren’t perfect but should help you narrow down what you’re looking for, or help your game get discovered if you’re creating for a retro console