GameShell is an open source, compact, modular, gaming device from Clockwork. It looks like a GameBoy, but it gives a lot more. It is powered by a quad-core Cortex-A7 processor and 1GB DDR3 RAM.
On the main board, you get built-in Wi-Fi and Bluetooth as well. The board can support Linux for everything you need from the device. GameShell is designed to be used for programming games or playing games and it has a lot more to offer.
This gadget looks really cool! You can get a kit that comes with everything you need including a 16GB microSD card, speaker, battery, and 2.7” RGB screen for about $160 on Amazon right now with a few different color options available. Oh, and you can connect the GameShell to your monitor or TV using the micro-HDMI port.