Anyone who has star wars battlefront 2 PC at home tell me because I am trying to do a multiplayer LAN game with my brother in the same house and we are doing LAN and are firewall is on and it's the same OS and same network and we can't see each others game. We can do a LAN game for Star Trek: Starfleet Command 2 Orion Pirates and firewall is on for that and we can see each others. So if you know how to do one tell me.

Are you sure that the firewall is your problem? It seems odd that it would work for your Star Trek game but not for Battlefront. Here's the possible solutions:

It could be your router that's causing the problem (but I doubt it because you can play Star Trek). Move it closer to the middle between you guys.

If it really is the firewall, you can temporarily disable it. To do this, click on your start menu and open the Control Panel. Under security, it should say "Allow a program through Windows Firewall." This requires you to either be on the administrator's account or know the password. Once it opens, go to the tab "Exceptions" if it isn't already open. Click "Add program..." and find the file for Battlefront 2. It could either be on the list of programs or not. If not, type in E: (which is the default directory for the CD drive). If it doesn't let you, manually click "Browse" and find E:

There's also a very, very rare chance that the problem is your game's disc.

I hope I helped.

their both XP computers