However, if you are running an original disc installation or a "preserved" version, you’ll need the standalone patch:
Massive overhauls like Battlefront Recon or the Extreme Mod often require the 1.1 executable. Download Star Wars Battlefront 2 V1.1
It was the final official patch released by LucasArts before the servers originally went dark. Where to Download However, if you are running an original disc