DESC: All new features to expand on the Guitar Hero II experienceOnline multiplayer featuring Pro Face-Off, Battle and Co-op modes Boss battles featuring the legends of rock Co-op career and head-to-head battle modeDownloadable content for X360, PS3, Wii including songs, themes, etc.New characters, venues, guitars, amps and moreWii Developed by Nintendo expert Vicarious Visions who is integrating unique Wii features with possible Nintendo content (i.e. Mario)55-70 all new songs from the greatest rock artists of all time3-5 exclusive tracks for each platformLocalisedcontent