It seems to be a NES emulator.
As I wrote in this comment, I was hoping for a more general reply that didn't take advantage of the fact that this particular browser game operated by emulating an NES. For another browser game that does not operate by emulating a classic video game console, would I need to make three versions: one for Windows, one for macOS, and one for X11/Linux?
So, I actually meant "ROMs currently being played."
As I wrote in this comment, would you be fine with the following choices, or would you instead leave?
- B. Purchase ROMs for use with emulator or PowerPak (requires PayPal or major credit card)
I've never been keen on running arbitrary code on my computer, even if it is sandboxed (build a perfect sandbox, and then, maybe).
If an application is available for download, it is also "arbitrary code". How do you run it?