College sweethearts Park Ji Young and Lee Young Il bonded over video games. She liked Warcraft; he was crazy about Masters of Magic. Together they spent hours sharing joysticks in their dorm rooms at Korea University in Seoul in the early 1990s. They married and in 1996 gave birth to Com2uS, South Korea's most successful maker of video games for mobile phones and one of the largest such firms in the world. The company sells more than 30 games, like finger-wrenching City Racer and Com2uS Bowling, to mobile operators including Vodafone, Orange, AT&T; Wireless, China Mobile and NTT DoCoMo.
Park,...