Stuck for ideas? Launch a Greatest Hits! As for music, so for gaming. To fill the gap until the next proper Guitar Hero sequel, Activision is launching Guitar Hero Greatest Hits, and the schtick is that fans get to vote for which should be included. It’s all happening via an embeddable widget. Sadly, the tracks have to have been included in one of the four previous Guitar Hero games, which scuppers our plans to launch a crafty web campaign to get Sunn O))) in there.