http://wccftech.com/original-star-wars-battlefront-ii-multiplayer/

The original Star Wars Battlefront II game, the one made by Pandemic and released in 2005, just got its multiplayer portion restored. Not only that but the game now features crossplay between Steam and GOG.

There has been an awakening… have you felt it? The original Star Wars Battlefront II (Classic, 2005), the critically acclaimed shooter of massively entertaining warfare, has received a critical update. Powered by GOG Galaxy, the multiplayer function of the game has now been restored AND with added Crossplay support between GOG Galaxy and Steam to boot.