Retro Game Challenge is awesome. It really is like a glimpse at a second childhood in the 80's and probably contains some of the best original NES games that were never made. It is a retro collection with an overall story about you being transported back in time to the 80s as a kid and having to complete a series of challenges on old 8-bit games (think Xbox 360 or Steam achievements). All the games were made from scratch specifically for this collection and they are GREAT (except the racing ones, I couldn't get into those).
Buy it.
There is a second game out in Japan, but the first one is selling so poorly here we'll probably never see it stateside, which is a damn shame, because I WANTS IT!