Guitar Hero [1] and Rock Band [2] were hugely successful [3] and required bigger and more expensive accessories than a simple gamepad. -- [1] https://en.wikip

Guitar Hero [1] and Rock Band [2] were hugely successful [3] and required bigger and more expensive accessories than a simple gamepad. -- [1] https://en.wikipedia.org/wiki/Guitar_Hero https://en.wikipedia.org/wiki/Guitar_Hero [2] https://en.wikipedia.org/wiki/Rock_Band https://en.wikipedia.org/wiki/Rock_Band [3] Guitar Hero III was the first game to reach $1 billion in sales https://arstechnica.com/gaming/2009/01/guitar-hero-iii-first-game-to-reach-1-billion-in-sales/ https://arstechnica.com/gaming/2009/01/guitar-hero-iii-first...