Now this is the kind of thing the internet is made for

 You can get miniature arcade games nowadays, small enough to fit on your desk with a two-inch screen, but playing the arcade classics. You can get a Bubble Bobble, but it's the NES version - decidedly inferior to both the original arcade game and the Sega Master System one - so you probably shouldn't. But I stumbled across a blog belonging to a dedicated game fan, who ripped his miniature Pac-Man apart and discovered that the PCB inside contains six different games, but only one of them is unlocked for each different commercial release! Now that's the kind of money-saving hack the world really needs in these difficult economic times!

This is why I try to restrict random browsing of internet articles - now I'm feeling compelled to hack into the inner workings of everything I possess and see what transpires...