Star Wars: Empire at War is a 2006 real-time strategy video game developed by Petroglyph Games and published by LucasArts. Set between Episode III and Episode IV, it focuses on the fledgling struggle between the Empire and the Rebels. It uses Petroglyph's game engine Alamo. In October 2006, an expansion titled Star Wars: Empire at War: Forces of Corruption was released. As of May 31, 2014, online functionality, including network multiplayer and wireless chat is no longer available due to Glu Mobile purchasing Gamespy and shutting down all game servers. This also affected multiplayer for the Star Wars Battlefront series as well as many other games on PC and consoles. However, these games' online functionalities are still accessible through third-party services such as GameRanger.