Here are some songs I find difficult to play on Guitar Hero smash hits,Guitar Hero Word Tour and GH5.

Guitar Hero smash hits*

1. Bark at the moon
2. YYZ
3. Through the fire and flames
4. Beast and the harlot
5. No one knows
6. Raining Blood
7. Free bird
8. Play with me

Guitar hero world tour*

1. Hot for teacher
2. Beat it
3. B.Y.O.B
4. Crazy Train
5. Mr. Crowley
6. Trapped under ice
7. Sweet home alabama

Guitar hero 5*

1. 21st century schzoid man
2. scatterbrain
3. One big holiday
4. spirit of radio
5. Young Funk

*I can't remember all.