Serenity Forge Founder Zhenghua Yang was told in 2008, when he was 18 years old, that he'd three hours to live after a nosebleed uncovered a life-threatening disease. He survived and began playing video games while he was hospitalised for next two years, following which he founded Serenity. With 70 published titles, Serenity makes $10-15 million/year, making Yang a millionaire.