Welcome to the Game World Guests: Hyo-yeon, Seo-hyun, Soo-young, Sunny, Tae-yeon, Tiffany, Yoona, Yuri (Girls' Generation) Details Casts Videos Galleries Posters Season Lists Title Welcome to the Game World Genres Comedy Reality Release Date 2015-07-05 Episode Runtime 01 Hours 25 Minutes Season Number 1 Episode Number 254 Production Companies Urban Works, Company Sang Sang, Prism Studios Yoo Jae-suk... Self... Jee Seok-jin... Self... Kim Jong-kook... Self... Haha... Self... Song Ji-hyo... Self... Yang Se-chan... Self... Jeon So-min... Self... Lee Kwang-soo... Self... [RUNNINGMAN BEGINS] [EP 1 TEASER] | Ten Years Ago, On This Day, They Begun To Run! (ENG SUB) (Teaser) Original Size (1325x745) Original Size (1440x810) Original Size (1280x720) Original Size (1920x1080) Original Size (3840x2160) Original Size (1920x1080) Original Size (2560x1440) Original Size (1280x720) Original Size (1440x810) Original Size (1600x900) Original Size (1298x730) Original Size (1280x720) Original Size (2184x1228) Original Size (1280x720) Original Size (1280x720) Original Size (2560x1440) Original Size (1920x1080) Original Size (2560x1440) Original Size (1440x810) Original Size (1623x914) Original Size (2560x1440) Original Size (1920x1080) Original Size (1280x720) Original Size (1280x720) Original Size (1280x720) Original Size (1280x720) Original Size (1280x720) Original Size (1280x720) Original Size (600x847) Original Size (1200x1800) Original Size (520x750) Original Size (1680x2520) Original Size (1200x1800) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (681x1000) Original Size (1440x2160) Original Size (600x900) Original Size (2000x3000) Original Size (1000x1400) Original Size (1200x1800) Original Size (680x1000) Original Size (1200x1800) Original Size (681x1000) Original Size (681x1000) Original Size (1200x1694) Original Size (680x1000) Original Size (1200x1697) Original Size (560x757) Season 1 712 Episode(s) 2010-07-11