The problem with the Atarimania list -
I see 5 in the Top 20 that don't deserve that status, and probably another dozen post-2000 releases that aren't in the list, some of which would be pretty high up the list.
Personally I don't agree with all of them, I've never even heard of some of them. But it's the closest thing to a "grouped mindset" of what people think about Atari games. There's probably been a game author or 2 who has self promoted their own game constantly.
I'm sure though if you gave your top 100, there would be plenty that any one individual would disagree with. I tried doing my top 100 songs once and all I got was comments from people of "you've left this one out and that one definitely doesn't deserve to be in there". Well, the ones that I left out I'd often not heard of or didn't deserve in my mind to be there and the ones that I liked, others didn't. It's so personal, nobody will give a completely fair 100.
Maybe we need a top 100 which is of "grouped opinion" and then a small panel of experts then cast their eyes over, looking for anything which is way out of place?