A billionaire forged in Free Fire, the Fortnite of Singapore

Forrest Li, founder and group chief executive officer of Garena Interactive Holding Ltd., speaks during an interview at the company's headquarters in Singapore, on Thursday, Aug. 25, 2016. Garena, a gaming and e-commerce empire that is now Southeast Asia's largest startup, is a Singapore-based company that's valued at more than $3.75 billion. Photographer: Nicky Loh/Bloomberg

Free Fire is a world unto itself. 

More than 40 million players log on each day to find weapons and battle it out till one character’s left standing. It’s Sea Ltd’s marquee hit, a virtual landscape housing more people than the American population and the prime reason Chinese-born founder Forrest Li is climbing the real world’s wealth rankings.