Yep, not all games appear there, and age does not count. There are some of the new games too that do not appear. I do not really miss this, as this was not present for the last 14 years since I play
okok... if there is something like that, It should work.
All I can tell, that there are games you cannot lunch, if they are not there. Example would be Gears of War, for which you need some Vista update, and can only be launched from that folder, by clicking on it...
Btw, I never use it for anything else, only GOW.