You can read the official patch notes here.
You can currently find the game on a variety of digital storefronts such as GOG or Origin, but only the Steam version is getting the update for now. So yeah, we will be hearing about Empire at War for years to come. But this drop is especially important because players are getting more love this time around, as the patch is broadening the modding possibilities. The Plus Mod is a mod for Empire at War not Forces of Corruption that fixes balance issues, restores cut content, and adds new content. The previous update dropped in 2018, so Petroglyph has been regularly taking care of the game.
The new patch, which has been cooked in collaboration with the game’s community, reintroduces a decent amount of cut content and offers a slew of quality-of-life changes and fixes. From new units to total conversion mods, Empire at War has evolved and thrived, eventually becoming the most expansive Star Wars RTS game around. Petroglyph’s real-time strategy title, which is quite different from 2001’s Galactic Battlegrounds, has been active for years thanks to its impressive modding community. We have just learned that Empire at War, one of the franchise’s most successful video games, has just received a huge update 15 years after its 2006 release. Star Wars: Empire at War refuses to die, and its new patch is big.