Chang Byung-gyu is a South Korean business executive, investor, and self-made billionaire, best known as the founder and Chairman of Krafton, the video game publishing and holding company famous for the global sensation PlayerUnknown's Battlegrounds (PUBG). Chang's background is one of elite academic and technical rigor: he attended Daegu Science High School, graduating early, and enrolled at KAIST (Korea Advanced Institute of Science and Technology).

He earned a Bachelor's, Master's, and ultimately a PhD in Computer Science from KAIST, solidifying his foundation in deep technology. This elite technical training, combined with his early entrepreneurial zeal, positioned him to become a serial founder and a national leader in South Korea's transition to the 4th Industrial Revolution.

Chang Byung-gyu's career is a continuous stream of successful tech ventures. In 1997, he co-founded Neowiz, a holding company, and served as its Chief Technology Officer (CTO). After leaving Neowiz in 2005, he founded a search engine startup, First Snow, which he successfully sold to Naver Corporation in 2006 for ₩35 billion won ($31 million), securing his initial wealth.

His defining move came in 2007 when he founded Bluehole Studio (later renamed Krafton), a video game developer. In 2017, the studio released PUBG, which became a global phenomenon and a massive financial success. Chang restructured the company, establishing Krafton as the holding company in 2018. Simultaneously, he served as the first and second Chairman of South Korea's Presidential Committee on the 4th Industrial Revolution (2017–2020), leveraging his tech expertise to guide national policy. His success cemented his status as a gaming billionaire and an influential figure in national technology strategy.

Chang Byung-gyu's social impact is massive and cultural, stemming from Krafton's dominance in global gaming and the economic activity generated by the PUBG phenomenon. His career is a testament to the profitability of deep-tech expertise applied to the entertainment sector.

His civic contributions, serving as Chairman of the Presidential Committee, focused on proposing industrial innovation plans for the South Korean government, structurally contributing to national technology policy. His philanthropy, channeled through his venture firm BonAngels, supports the next generation of Korean tech entrepreneurs.

Chang Byung-gyu maintains the highly professional and intellectual style of a South Korean tech executive and academic. His attire is consistently formal, favoring tailored suits for corporate and political engagements. His aesthetic reflects his status as a deep-tech visionary who successfully navigated both the gaming industry and national governance.

Residing in Seoul, his luxury is the profound financial security and influence derived from commanding a multi-billion dollar, globally dominant gaming company. His life is defined by his commitment to technical innovation and his unique role in linking the technology sector to national industrial strategy.