My brother still uses them (AOL) and he told me that he does have some trouble with gaming sites. He is having trouble with the ones that open a new window after you login to a site.
maxdemo - Tell your brother to forget the AOL browser as it has MANY problems with all kinds of sites and not just gaming.
He will have a much better Internet experience if he just minimizes the AOL browser after he logs on and Surfs the Internet with Internet Explorer.
Download it here http://www.microsoft.com/windows/ie/default.asp