Is there a web page or site that lists what xbox 360 games are not supported on xbox live?

I've purchased a few xbox 360 games recently that I wanted to play on xbox live but couldn't because the games were not supported by either xbox live or the game publisher's servers. Chromehounds, Army of Two are a couple of examples. Is there a site somewhere that has a list of games that are no longer supported on xbox live? Thanks for any help.Is there a web page or site that lists what xbox 360 games are not supported on xbox live?
I've never seen such a list, but generally, EA's games are the ones that lose online support. They shut down their servers especially for sports games because there's a new one every year.