'Monopoly Go!' crossed $6 billion in lifetime in-app purchase revenue 1,275 days after launch, making it the fastest mobile game to reach the milestone, reports said. It surpassed Tencent's 'Honor of Kings', 'Genshin Impact' and 'Clash of Clans'. The game currently ranks as the 14th highest-grossing mobile game of all time in terms of player spending on iOS and Android.