27. Sony PSP Go (2009-?)

Ah, the Sony PSP Go. What can we say? This is one of those products that was a good idea in theory, but a bad idea in practice. Part of the reason behind the PSP Go's failure was that while Sony was moving away from UMD and toward downloadable games, the iPhone was taking off as a game platform and the games were much cheaper and didn't take long to download. Also, the Go was pricey at $250.

The end result? You don't see too many of these guys in the wild.