Yes Mookie, I think it is.
You would need to rename the showroster.php each time along with any other uploads to something different.
Then for it to display correctly you would have to create secondary usergroups for each game and then mod which members appear on each roster. I think it maybe hard to do though and I wouldnt be inclined to try just incase :s
Maybe Sarcoth with know more.
However you could add an extra profile field called "games" then have a dropdown for the games your members play. Then add it to the roster with icons or just text.
Have a look
www.sog-team.co.uk/forum/showroster.php
Good luck
Matt