This is cool.

Some of the most iconic NES games around have gotten a makeover—and you can experience it first-hand in your browser. If you’re running Firefox, that is.
3DNes Emulator is a curious experiment that transforms NES games into 3D landscapes. A beta was released yesterday, which you can play here, but if you’d like to watch it in action first, take a look below. It’s kind of bananas. This trailer features short demos of games like Contra, Mega Man, Dr. Mario, Zelda, and more.