Streaming platforms like Steam Link and in this case Moonlight make it possible to play modern PC titles using a Raspberry Pi. Project creator Tombston used Moonlight for this awesome 3D-printed Raspberry Pi handheld.
Instead of emulating games on the Pi, this system is designed to stream them wirelessly from a PC. This requires much less power from both the CPU and GPU, so you don't need a powerful Pi module to pull this project off.
The handheld uses a 5.5" Waveshare screen with a 1080p resolution. A Raspberry Pi Zero W is used to control the whole operation. But instead of using the built-in Wi-Fi from the Pi Zero, Tombston opted to use a USB wireless dongle.
The buttons were recycled from old Dual Shock knock-off controllers. A 5000mAh LiPo battery makes the handheld totally portable. The case, as well as the triggers and bumpers, were 3D printed from a custom design.
If you'd like to read more about this project, check out the full post on Reddit for a video demonstration and brief overview of the build process.