Tencent's Honor of Kings has long been topping charts in China. The title's success resulted in the release of Arena of Valor, a version of the popular mobile MOBA targeting Western audiences. According to Sensor Tower's Store Intelligence estimates, Arena of Valor grossed $1.7 million in September. This revenue is the title's highest monthly earnings ever, and it represents both long and short-term growth for the maturing title outside China.

September's milestone revenue numbers mark 49 percent growth month-over-month compared to August, and 143 percent growth year-over-year compared to September 2017, when the game was still in soft-launch and not yet available in major markets such as the United States. The title officially launched in the U.S. last December.

Thanks in part to a great September, the MOBA has reached $15 million all-time player spending on the App Store and Google Play. The top contributor to this figure has been the U.S., whose players have contributed about 30 percent of all earnings to date. For reference, Germany is the second largest market and accounts for 14 percent of revenue.

Additionally, Arena of Valor experienced annual download growth in September. There were an estimated 1.1 million installs last month, which marks a 170 percent year-over-year increase, again compared to the soft-launch period. These install figures have pushed Arena of Valor past 16 million all-time downloads.