How many need for speed games are there and what are the names?

• The Need for Speed (1994)
• Need for Speed II (1997)
• Need for Speed III: Hot Pursuit (1998)
• Need for Speed: High Stakes/Road Challenge (1999)
• Need for Speed: Porsche Unleashed/Porsche 2000 (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)
• Need for Speed: Nitro (2009)
• Need for Speed: Hot Pursuit (2010)
• Shift 2: Unleashed (2011)
• Need for Speed: The Run (2011)

Not including browser playable games, there are 17, but with the in-browser playable, 18.