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.     Mattias and Anton made Tiger Jenny, a NES/Famicom game based on characters from the credits sequence in Ittle Dew. You can get the ROM here, and the source code here! (To play this game, you'll need a NES/Famicom emulator like FCEUX, or a cart like Everdrive N8.)     Mattias made Questforge, an Atari 2600 game. Get the ROM here, and source code here! (To play this game, you'll need an Atari 2600 emulator like Stella, or a cart like Harmony.)     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!