Game shows seem to have a history of being passed over for many lists like these. If it's a general "Top shows" lists, then, a long-runner like Wheel or Price may be added in somewhere, but otherwise, Games are virtually ignored. Why is this? I can't really say. A number of reasons possibly.
It's possible that the people who make these lists are unaware of moments that frequent watchers of game shows feel are special. It's also quite likely that they feel that events that happen in daytime, or in general syndication, have less meaning than the higher-rated, higher-profile primetime network shows. These things tend to skew towards the primetime content, at the expense of other, possibly-deserving shows. Another, quite real, possibility is likely that occurances from less-exposed game shows from twenty years ago just don't resonate as much in the minds of the mainstream viewers they want watching as, say, Marcia Brady getting hit in the nose with a football. Many people have heard of the latter, but if you were to nominate Thom McKee's rain of terror, you'd largely get a "Huh?" . This resonance largely comes from the fact that the football episode of Brady Bunch has been reran trillions of times in the last thirty years, while Thom's run...well...hasn't.
