The Magnavox Odyssey 2, also known as the Philips Videopac G7000, and a console released back in 1978 is a rather unique and oddly popular beast. You can find out more about it here and here. To emulate it try this link. Better though grab the original machine and experience its odd built-in keyboard and impressively packaged games. It usually isn't that expensive either.
This Magnavox Odyssey 2 auction seems, for example, like a good opportunity. Seller ships worldwide and, besides a fully working console, will be including 2 joysticks, 7 boxed games and all necessary bits and cables that will help you actually play on the thing.