The Team Fusion mod isnt distributed by Steam because its not an official patch. That said....just about everyone runs thr TF mod. It really is fantastic.
On a side note: you will find CLOD can be very challenging when compared to AH. Not as many players on a server but the maps tend to be smaller and the fights are more difficult especially when the realism is turned up and your have to worry about engine management. I think you will like it but it will take some getting used to.
