When the NES and SNES Classic Editions were released it didn't take long for hackers to find a way of installing new games onto them, so it shouldn't come as a massive shock to discover that the same thing has happened to the Genesis / Mega Drive Mini, a rival system from Sega.
As was the case with Nintendo's micro-consoles, the hack requires a PC and some digital jiggery-pokery, but once you follow the steps outlined in the video below, you'll be well on your way to expanding the number of games on your Mega Drive Mini.
The Project Lunar tool even allows you to select box artwork, choose player counts and set the genre so that everything looks 100% authentic on the console's menu screen. This hack also allows you to install RetroArch and Emulation Station, which allow you to run other emulators on the Mega Drive Mini.
According to the person who made the video, you should be able to fit approximately 100 additional titles onto the system, which certainly makes the whole process worthwhile, but you can't (at the time of writing, at least) remove the pre-installed games.
As ever, there are risks involved and it's possible that the procedure will leave you with a totally dead console – we'll leave it up to you to decide if it's worth the danger.