Oh, thought of another one to list here: Micro Mages. It’s not just NES styled game, but an actual NES game with a emulation wrapper around it for Steam. You actually get a NES ROM when you buy the game that’s playable in all the emulators I’ve thrown it into. I’ve actually got a copy of the rom on my 3DS.

The real interesting thing that the devs put out a video about the challenges of fitting their game onto a NES cart (which is actually how I found out about the game). While the game is kinda small, (I think… I haven’t actually beaten it) it’s well worth the current sale price 99 cents.