Universe at War: Earth Assault is a real-time strategy game originally to be named Invasion: Earth, developed by Petroglyph and published by Sega. Universe at War: Earth Assault was intended to be the first game in a planned series of games to be called the Universe at War series. On May 10, 2007, Sega announced that the title was also in development for the Xbox 360, which was released in 2008. Further, on June 27, 2007, Sega announced that the title would allow cross platform multiplayer through Xbox Live and Games for Windows - LIVE services.