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yes you can with either the rock band drumset or guitar hero set
Rock Band 2. DJ hero looks confusing with the DJ shaped comtroller and you can only use a guitar hero guitar controller not a drumset or a mic. So, rock band 2.
a microphone, a drumset, a guitar (Paul McCartney's bass if you get limited edition) and the game
It does, you maby just bought the game by itself. You can buy the drums and the guitar with the game.
In Guitar Hero World Tour, you can use the guitar and mic from rock band to play. just not the drumset. But anything before world tour, that would be a no.
No, kind of obvious PS2 and 360 dont mix
I believe you have to complete the endless setlist 2 on hard. You will also have a gold drumset sitting in your closet.
New answer: The cymbals will not work out of the box with the rock band 1 drum set, but there are ways of modifying the RB1 drum set so that they can use the cymbals. See the link below. Old answer: http://www.instructables.com/id/Mod-Rock-Band-2-Cymbals-for-Electronic-Drumset-or-/
In my experience, any guitar worked for both Guitar Hero and Rock Band in the majority of the games, including Rock Band 3.