The stylistic melodies of Kurt Cobain, Krist Novoselic and Dave Grohl, the pioneers of alternative rock, Nirvana, make their Guitar Hero downloadable content debut with the Nirvana Track Pack.  As promised, three Nirvana songs were released for Guitar Hero: World Tour today for the Wii.  The DLC release features ”Negative Creep”, ”Sliver” , and the band’s final [...]