Games that were too good for their own good.

[haxxiy]

None for me.

Surprise, surprise, it's impossible to be at the top of the game always, and not all sequels will be better than their predecessors. And that's just fine.

Of course, that sort of thinking might sometimes get into the minds of developers, considering how toxic gamers can be, and derail the development - in the broader sense of the word - of some franchises.