Question: What award winning game designer and New York Times best selling author, designed "En Garde!"?

Context paragraphs:
Sharon Salzberg: Sharon Salzberg (born 1952) is a "New York Times" Best selling author and teacher of Buddhist meditation practices in the West.  In 1974, she co-founded the Insight Meditation Society at Barre, Massachusetts with Jack Kornfield and Joseph Goldstein.  Her emphasis is on vipassanā (insight) and mettā (loving-kindness) methods, and has been leading meditation retreats around the world for over three decades.  All of these methods have their origins in the Theravada Buddhist tradition.  Her books include "Lovingkindness: The Revolutionary Art of Happiness" (1995), "A Heart as Wide as the World" (1999), "Real Happiness - The Power of Meditation: A 28-Day Program" (2010), which was on The New York Times Best Seller list in 2011, and the follow-up "Real Happiness at Work" (2013).

J. L. King: J.L. King is a New York Times best selling author, publisher, and HIV/STD activist.  Subjects of his work include the nature of human behavior, effects of health issues on minorities, and sexual orientation and its impact on schools.  King’s first book, "" appeared on The New York Times best seller list for more than 30 consecutive weeks.

Marc Ostrofsky: Marc Ostrofsky is an American entrepreneur, venture capitalist, New York Times Best Selling Author and public speaker.  He is the author of the books "Get Rich Click! : The Ultimate Guide to Making Money Online", and "Word of Mouse: 101+ trends in How we Buy, Sell, Live, Learn, Work and Play!" .  "Get Rich Click" was in the top ten of the lists of bestselling books compiled by USA Today, "The Wall Street Journal" and "The New York Times".

En Garde!: En Garde!  is a role-playing game set in 17th century Paris.  Players take the roles of gentlemen duellists.  The game was designed by Frank Chadwick and first published by Game Designers' Workshop (GDW) in 1975.

Regina Calcaterra: Regina M. Calcaterra (born 1966) is an American attorney and a New York Times Best Selling author.  She is a partner at Wolf Haldenstein Adler Freeman and Herz and formerly served as Deputy General Counsel to the New York State Insurance Fund and the executive director to two recent New York State Moreland Commissions, including the Utility Storm Preparedness and Response Commission and the Commission to Investigate Public Corruption.  Her state appointments followed her service as Chief Deputy County Executive to Suffolk County Executive Steven Bellone.  She is also an advocate for foster children and formerly served as a frequent commentator of policy and politics appearing on CNBC, Newsday, and other local media outlets.

Renee Raudman: Renee Raudman (born October 29) is an actress and voice actress who performed the English voice of Nastasha Romanenko in the video game "Metal Gear Solid" (under the pseudonym of Renne Collette) and its (using her real name).  She also provides the voice of the recurring character Ms. Butterbean on the cartoon series "The Grim Adventures of Billy and Mandy".  Outside of voiceover, Renee has recorded over 30 audiobook narrations, including as a co-reader on "Dark of Night" written by Suzanne Brockmann ("New York Times" best selling author of "Into the Fire") and 13 books written by New York Times best selling author Ilona Andrews.

Relentless (Koontz novel): Relentless is a 2009 suspense thriller from "The New York Times" #1 best selling author, Dean Koontz.  The story follows the plight of best selling author Cullen "Cubby" Greenwich, his wife, son, and family dog, Lassie, who are being stalked and hunted by a feared and revered national book critic, Shearman Waxx.  The novel was released in the US on June 9, 2009 by Bantam Books.

Tosca Reno: Tosca Reno (born May 22, 1959) is a New York Times best selling author who has written "Your Best Body Now" and the "Eat-Clean Diet" series.  She is a certified Nutritional Therapy Practitioner.  She is also a fitness model and columnist.

JaQuavis Coleman: JaQuavis Coleman is an American author.  He is a member of the YMCMB book division, and along with his wife Ashley Antoinette, via the pen name Ashley & Jaquavis, is a New York Times bestselling author.  He is married to New York Times Best Selling Author Ashley Antoinette.  Ashley Antoinette and Jaquavis were named by "Ebony" magazine as one of the most powerful couples in 2012.

Frank Chadwick: Frank Chadwick is an American multiple-award-winning game designer and "New York Times" Best Selling author.  He has designed hundreds of games, his most notable being the RPGs "Traveller", "" and "Twilight 2000", and the wargame series "Europa" and "The Third World War".

Supporting paragraphs: En Garde! Frank Chadwick
Answer: Frank Chadwick