Series/Franchise milking the most out of people?

I love it but still, so many:
The Need for Speed (1994)
Need for Speed II (1997)
Need for Speed III: Hot Pursuit (1998)
Need for Speed: High Stakes / Need For Speed Road Challenge (1999)
Need for Speed: Porsche Unleashed (2000)
Need for Speed: Hot Pursuit 2 (2002)
Need for Speed: Underground (2003)
Need for Speed: Underground 2 (2004)
Need for Speed: Most Wanted (2005)
Need for Speed: Carbon (2006)
Need for Speed: ProStreet (2007)
Need for Speed: Undercover (2008)
Need for Speed: Shift (2009)