sentences:  Later, in November 2008, Activision acquired Budcat Creations, another development studio that had helped with the PlayStation 2 versions of "Guitar Hero III" and "World Tour", announcing that they would be helping to develop another game in the "Guitar Hero" series.In 2007, Harmonix and MTV Games released a new music title through rival publisher Electronic Arts, called "Rock Band".It expanded upon the gameplay popularized by the "Guitar Hero" series by adding drum and microphone instruments, allowing players to simulate playing songs as bands.