The site is dedicated to listing the references to movies, anime, manga etc. found in retro games, and you can't imagine how much there are out there!
To give just two quick examples :
▼ Did you know that the flyer from WOLF OF THE BATTLEFIELD was based on the one from FLASH GORDON?
▼ Or that the special intro of TERRY V.S. ANDY in K.O.F. '98 is an homage to HOKUTO NO KEN?
Of course there are much more examples like these ones. It's quite amusing, actually. Almost like it was fashionable among the Japanese game programmers/artists of the time to pay homage to their favourite movies, manga, actors etc. in their projects.
The site is obviously in Japanese, so many of you will probably need some help from the Google and Babelfish translators.
It's all very worthy though, since it is a very interesting site, specially for retro game fans.