you could also look at codeweavers... they now have more than just crossover office.... They do have a game flavor as well!! don't know much about it just saw it on their site a while back...( as you I'm rather busy and havent' had time to give it the time it deserves to check out )
here is their product page:
http://www.codeweavers.com/products/Call of duty 2 is one of their listed compatible games....
-- edit ---
also for future reference for gaming you could try
www.tuxgames.com
they have some games that have been ported to linux....
This post has been edited by shard92: Apr 30 2008, 01:19 PM