Natural Funativity by Noah Falstein @ Gamasutra.com (Nov 10, 2004)
http://www.gamasutra.com/features/20041110/falstein_pfv.htm

게임의 정의 (디스이즈게임)
http://www.thisisgamelab.com/1675

ludology.org
http://www.ludology.org/

Ludology from Wikipedia
http://en.wikipedia.org/wiki/Ludology

gamestudies.org
http://gamestudies.org/

Gameology
http://www.gameology.org/

http://www.dreamo.co.kr/bbs/view.php?id=007_games&page=1&sn1=&divpage=1&sn=off&ss=on&sc=on&select_arrange=headnum&desc=asc&no=7&PHPSESSID=d3f608c39702c8a83ddd467c88b7ef15

아무도 예상 못한 신드롬, ‘문명 하셨습니다.’
http://gamelog.kr/651

Ralph Koster, A Theory of Fun
http://www.theoryoffun.com/theoryoffun.pdf

Richard Garriott
http://mirror.enha.kr/wiki/%EB%A6%AC%EC%B2%98%EB%93%9C%20%EA%B0%9C%EB%A6%AC%EC%97%87