Guitar Hero 5, previously referred to as Guitar Hero V, is a rhythm video game and the fifth main entry in the Guitar Hero series. The game was developed by Neversoft and published by RedOctane and Activision, and released internationally in September 2009 for the Xbox 360, PlayStation 2, 3 and Wii consoles. Similar to the preceding title, Guitar Hero World Tour, Guitar Hero 5 is geared towards playing in a four-person band experience, including lead and bass guitar, drums, and vocals. The game is available as a standalone title, allowing players to use existing compatible instrument controllers, and as a bundle that provides these controllers. Guitar Hero 5 adds several new features, such as drop-in/drop-out play, bands composed of any combination of available instruments, a Rockfest competitive mode consisting of several various scoring mechanisms, and both song-specific and general Challenges to unlock new avatars, clothing, and other extras in the game. Many of these changes were added to make the game a more social experience, allowing players across a range of skill levels to be able to play cooperatively and competitively against each other both locally and online.
Source: Wikipedia, "http://www.wikipedia.com/wiki/Guitar_hero_5," available under the CC-BY-SA License.