The best case we’ve found comes from Thingiverse user jrepeiro. It’s made so you can use the case with Raspberry Pi Model B+ or with a Model 2/3. Unless you feel like pulling out a set of model paint, you’ll miss out on the Nintendo branding, but otherwise the case is a surprisingly well-made little replica that you can get 3D printed from Thingiverse directly for about $30. From there, you’ll just need a couple of controllers like these ones from Amazon, the Raspberry Pi (we’d recommend the Model 3) as well as a power supply. All told, the whole project should cost around around $85, but unlike Nintendo’s official option, you’ll get far more games.