The cartridge is available in a standard $50 edition as well as a $150 limited edition with an LED "monitor" that lights up while you're playing. Both versions are region-free, so you're clear to play wherever you happen to live. Those may seem like steep prices for a title that plays on a decades-old console, but it's really all about funding a good cause -- it's just that you get a very special memento in return for your contribution.