Hello there! We recently made a couple of games for Retrospelsmässan, a retro game fair in Gothenburg. These are actual ROMs that run in emulators and on the real hardware.
Daniel made J.Ö.R.G.E.N., an Atari 2600 game. Get the ROM, source code and included Stella emulator here!
Anton made Atarena, an Atari 2600 game. Get the ROM here!
For more information on how these were made, this guide is what Mattias used when making Tiger Jenny. We also used Batari Basic when making the Atari games.
There were more games shown at the fair, but the makers don’t consider them complete enough to release yet. We hope you like the games!