It depends. Harmonix created Guitar Hero 1, 2, and 80's. RedOctane/Activision created Guitar Hero 3, Guitar Hero: Aerosmith and Guitar Hero: World Tour. You can tell the difference by the graphics pretty much.
To continue on the trend after guitar hero 2.
guitar hero 3 was invented October 28th 2007, (this was the release date)
because of air guitar
it was invented in 2004
It was invented in 2005.
2005 when guitar hero was created
people invented guitar hero to have fun without having to go through learning to play guitar
November 8, 2005
The coolest dude in the universe
when pigs fly in the Sahara desert breathingfire
guitar hero guitar hero 2 guitar hero rock the 80's guitar hero 3 guitar hero aerosmith guitar hero world tour guitar hero mettalica guitar hero 5 guitar hero van halen dj hero band hero
Most likely guitar hero, considering it was the game that brought rock into rhythm games and invented the guitar controller.