Series/Franchise milking the most out of people?

[COLOR="Red"]

 GH Games

[COLOR="Red"]Gutiar Hero (2005)
Guitar Hero 2 (2006)
Guitar Hero Encore: Rocks the 80's (2007)
Guitar Hero 3: Legends of Rock (2007)
Guitar Hero: On Tour (2008)
Guitar Hero: Aerosmith (2008)
Guitar Hero: World Tour (2008)
Guitar Hero: On Tour: Decades (2008)
Guitar Hero: Metallica (2009)
Guitar Hero: Modern Hits (2009)
Guitar Hero 3 Arcade Game (2009)
Guitar Hero: Smash Hits (2009)
Guitar Hero 5 (2009)
Guitar Hero: Van Halen (2009)
Guitar Hero 5 Mobile (2009)
Guitar Hero Arcade (2009)

Coming soon:

Band Hero (2009)
DJ Hero (2009)[/COLOR]

Updated the chart to more accurately depict the immense amount of moneymaking Activision is doing, and Van Halen came out two days ago. YAY FOR GUITAR HERO 15 OR 16...

I must admit I played the arcade version of GH3 at an amusement park, and I also have to admit that it sucked.[/COLOR]

Well, Neversoft/Activision has been doing all the milking. GH1, 2, and 80's were all Harmonix games(Those probably being the best ones too)