Yeah, i couldn't play several 7650/3650 games on my 7610 (basically the same platform as 6600). Example: Bad colours etc. So, i don't think that all 7650 games would work properly on the 6600. I guess it's cuz those games for 7650/3650 is specially for them and since those phones only had 4k colour screens, when u play these games on a 6600 and 7610, the colours would be all messed up. Same situation when u try to play an Ngage on 7610 and 6600