PPL would never have made the list. Even if it is the better game, it could not have beaten out Tetris Attack, because the games are too similar, and Tetris Attack is the "original" (in America, at least). And Tetris Attack could not make the list because it is considered blasphemy to say that Tetris is not the greatest puzzle game of all time, and with 100 precious spots, IGN wouldn't want to waste two on puzzle games.
Well, call me a blasphemer. I share your sentiments, Insane Steve, but politics prevented TA and PPL from being on the list. Oh well. I don't really think that Super Mario Brothers is the greatest video game of all time, but I am still inexplicably happy to see it at the top of the list, and I'm sure THAT choice involved a lot of politics, also.