query: When was the video game Rock Band first introduced?
passage: Rock Band (video game)
Rock Band is a music video game developed by Harmonix, published by MTV Games and distributed by Electronic Arts. It is the first title in the Rock Band series. The Xbox 360 and PlayStation 3 versions were released in North America on November 20, 2007,[2] while the PlayStation 2 version was released on December 18, 2007[6] and the Wii version on June 22, 2008. Harmonix previously developed the first two games in the Guitar Hero series, which popularized gameplay of rock music with guitar-shaped controllers. After development of the series was shifted to Neversoft, Harmonix conceived Rock Band as a new title that would offer multi-instrument gameplay.
passage: Rock Band
The first "Rock Band" features a more traditional "Career" mode for a single player on either lead guitar, drums, or vocals, dividing the on-disk songs into nine tiers arranged by difficulty of the song for that instrument. Each subsequent tier would only be unlocked after completing the songs in the previous tier. The player would earn in-game money based on their performance. This was removed in "Rock Band 2" for the improved "Tour" mode.