Xbox users have to pay $20 more to use old instruments on Rock Band 4 | Ars Technica
Microsoft might add to its massive library of backwards compatible Xbox titles soon - Xfire
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Guitar Hero III Remake - There's still a slim chance that it could happen. A game series can be revived by simply remaking or remastering the game. A good example of this
Rock Band and Guitar Hero May Be Returning in 2015 | WIRED
Guitar controller - Wikipedia
Can You Use Guitar Hero Controllers On Xbox One? – FuelRocks
New Guitar Hero costs $99, isn't backwards compatible | VG247
Xbox Backward Compatible Games | Xbox
Amazon.com: Guitar Hero Live 2-Pack Bundle - Xbox One : Guitar Hero Live: Video Games
New Guitar Hero costs $99, isn't backwards compatible | VG247