xfire is a client side app. However, once it's installed you can use it to launch games straight from a website.
So, for example, I create a thread here with a link to my CoD4 server, with Xfire I can click straight on that link and it will launch into the game through Xfire.
An example of the link would be this:
xfire:join?game=cod4mp&server=xxx.xx.xx.xx:xxxxx
However, I think this needs some kind of control over the registry, so I'm now incredibly highly doubting that it's possible without some form of plugin.







