Subdivide in Game Engine?

I really want to be able to use sub surf for my models in the game engine, can i do this? or must i export then import models after being subsurfed.

subsurf isn’t really the way to go, but If you really need it, click “Apply” in the subsurf modifier panel. Or if you are using something earlier than 2.4a then press [alt]+[c]

thanks!