What is Gary Gygax's claim to fame?

More Questions:

In what country would you find the active volcano "Lassen Peak"?

What organ gave us the word "hysterical"?

Who played the role of Joey Potter on the TV show "Dawson's Creek"?

'Take the A Train" was the signature tune of whose band?

Who plays the role of Summer in the movie "500 Days of Summer"?

What athlete had a part in the movie "The Dirty Dozen"?

In the TV show "The Simpsons', what vehicle is described as "A country-fried truck endorsed by a clown"?

In the film "The Great Escape', what were "Tom', "Dick" and "Harry"?

Whose music is featured in the musical movie Mamma Mia!?

What is comedian Stephen Colbert's full birth name?

What was Spencer Tracy's last film?

The number 20 is the basis for which numeral system?

Daniel Keyes wrote which 1959 Hugo-award winning Science-fiction novel?

What musical instrument did Jack Benny play?

Who is the twelfth member of the group LOONA to debut?