I was talking about World Series walkoffs with a coworker yesterday and I strongly believe that Game 6 of the 2011 World Series is right up there with this one, with Carlton Fisk, and some of the other most incredible games in baseball history. Twelve years seems a long time for it to be recency bias, so it probably has to do with the fact that baseball had long since ceded the national spotlight (or because Joe Buck's botched hair plug situation screwed up the audio). Four lead changes in the first nine innings, the Cardinals down to their last strike, the series-winning ball for the Rangers literally being in the air (and potentially caught by a better outfielder than Nelson Cruz), Josh Hamilton un-tying the game, the Cardinals being down to their last strike AGAIN and tying it AGAIN, and then a walk-off homer from David Freese in the 11th.
That has to be easily one of the 3-5 best games in World Series history and it doesn't even have a nickname.