Of course. All controllers are compatible with each game.
Guitar Hero World Tour and Guitar Hero Metallica
yes
Yes
Yes, it does.
no. i have guitar hero world tour but my guitar is decorated for guitar hero aerosmith.
Any controller from GH3 will work fine.
Yes the guitar controller for Rock Band will work on Guitar Hero World Tour. Rock Band drums and microphone also work on Guitar Hero World Tour.
yeah it will but you can't tap with the guitar controller on guitar hero two.
Yes, the controllers can be used for all guitar hero games
Yes
Yes the guitar hero world tour (4) controller will work with guitar hero 3 on any system
Yes, Guitar Hero 2 controller will work in any other guitar hero game same as guitar hero world tour controller can work on any guitar hero game, But you cant use xbox360 controller on another console guitar hero game.