To do so you can use GameSpy Comrade, that includes an instant messenger, but that also allows us to open the games that are compatible directly from its interface, search FilePlanet looking for the demos of the latest games or to buy games directly from Direct2Drive.
GameSpy Comrade has a rather clear interface, and shows the user information, the games that are installed, and the games that are available on the Internet, both those that are online as well as those that are offline.
Furthermore, GameSpy Comrade allows you to access a file about each one of the compatible games that allows the user to access more information about them. Another important detail is that it can be used to maintain cross platform conversations.
Therefore, if you want to have access to a way of speaking with your friends and also have access to games and demos very easily, download GameSpy Comrade.