That's because the dumb ass Harmonix sons of bitches made a quick cash-in ps2 port!!
Harmonix: "oh crap, look how good guitar hero sold on Wii, better than ps3 even!!! We better make rockband for Wii. Quick just take the ps2 version and make it waggle."
Ignorant fucks. The reason guitar hero sold well is because it has nearly all the same features as the PS360 versions.
This will sell poorly.







