launch (evaluation) hack

OK. My webroot has two folders - forum and games.
I have dumped vbulletin files into the forum folder. In the games folder, I have all my game.php files.

To play a game, a member must be registered and logged on.

Is there a hack that can possibly do "member evaluation" and launch a file in a separate (games) folder. Is this even possible and are there any alternative approaches.

Thanks.