KiCad design files and software to create a tiny game console in the business card form factor. I release both software and hardware as open source. I consider the hardware as finished, but I will keep revisiting the software to add more games and alternative implementations.
(Note: I did not release the silkscreen details containing my contact details and the comic of my face. But if you base your own business card on this, you'll want to add your own silkscreen details anyway, won't you?)
For more details, head over to the Github Repo [1] of this project.