I assumed it was a favorites or top classics.
The thing is, everyone knows PacMan is an undisputed alltime classic. It defined the 80s. But really, there are far better Classic games out there. The same can be said about a bunch of the well known classics.
If we are talking merely 'well known' classics, or 'most innovative' for the time classics... the lists change. When I think 'Best' classics however, I have to try to weight each classics gameplay to decide on which ones Id rather play for long periods of time. Which is why knowing how well the games balance plays out deep into the game.. is kind of necessary.
Sinistar is one of my Favorites. Its arguably one of the more well known classics too. But gameplay wise.. its gets almost impossible at level 2, and then gets almost 2x more difficult by level 3. Basically, its nearly unplayable due to poor balance. This was of course due to the company forcing the games designers to tweak it at the last moment, in order to make more money for the ops.
Because of this flaw, I have to discount it from my lists of BEST... because other games like Robotron, are better balanced and still playable deep into the game. (if you are skilled enough & cna maintain the intensity and concentration)
Still, if we were to put a classics game compilation together.. Sinistar HAS to be on it. Its incredibly fun, challenging, and its atmosphere and level of Awesome, is just way up there. (sadly, without extreme alteration, Sinistar is unplayable on any compilation due to the controller itself. Similar for Spy Hunter)