In 2006, I built a game console for my senior project in college. I modeled it on the 2D consoles like Sega Genesis and SNES. Last year, I started transforming it into an Arduino-based system. Now I have completed it, after a year's work.
Link:
https://www.kickstarter.com/projects/502532396/duinocube-a-retro-game-console-you-can-hack
About DuinoCube:
Has graphics, audio, USB gamepad, and SD card support.
Capabilities are comparable to Super Nintendo.
More comprehensive than other Arduino shields such as Gameduino.
Compatible with multiple Arduino boards.
Aimed at hobbyists who would like an easy way to develop games on a console.
About me:
Doing this as a part-time project of my own.
Background in embedded systems.
Working as software engineer at a major Silicon Valley tech company.