health system. The Xbox 360 version sold more than 250,000 copies in its first week, more than two million copies by January 2008, and nearly six million copies by November 2013. Retrospective reviews have been positive, with critics praising the game's improvements over its predecessor and innovations that become the series' mainstays, although some have found it dated. It is considered to be one of the Xbox 360's best games and one of the best video games of all time.

Gameplay