"Yodobashi Camera", Shinjuku

One of the big three electronics stores in Japan. There's not a huge difference between the three in terms of price and selection, but Yodobashi has a tendency to run special offers and have clearouts on occasion.

Yodobashi is large enough to warrant 4 buildings in the area. This one on Shinjuku west side, dedicated solely to games and gaming, is definitely worth checking, even if just for window shopping.