Help with Halo 3, Guitar Hero 3, and Rockband?

[KrugXemo]

Sorry for bothering you people. but does anyone know cheats fro halo three for xbox 360. Plus i can't get pass the last songin hard on guitar hero. And in rockband for the song black hole sun who can do hard?

 

[Jasmine M]

I can play black hole sun on hard, But I don't know how I can help much