Portaberry Pi Ultra
Building on his previous work on the Portaberry Pi, 3Derp has made a whole bunch of improvements to make a really versatile gaming machine. Running RetroPie using a Raspberry Pi 2, this portable emulator can emulate N64 and Playstation 1 games, along with a whole range of older systems.
Using a combination of laser cut and 3D printed parts, 3Derp has designed a very attractive case. The build process is fairly intensive, so we wouldn't recommend this project if you're a beginner when it comes to soldering, electronics or Raspberry Pi programming.
If you feel up to the challenge, head over to Thingiverse to read through the very detailed build guide, and check out the videos of the Portaberry Pi Ultra in action!