There’s a CHIP-8 emulator written for most platforms, now including UEFI. The executable uc8.efi is built using the GNU-EFI toolchain, not the Tianocore toolchain.
“CHIP-8 emulator as an UEFI application”
Usage: uc8 FILE [ROM]
Follow the instructions on your screen. In case of trouble, press Z.
About CHIP-8, Wikipedia says: ”
There are a number of classic video games ported to CHIP-8, such as Pong, Space Invaders, Tetris, and Pac-Man. There’s also a random maze generator available. These programs are reportedly placed in the public domain, and can be easily found on the Internet.”
https://github.com/Reisse/uefi-chip8
https://en.wikipedia.org/wiki/CHIP-8
Firmware Security 
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