A pair of Tencent titles took the top two spots in the ranking of the world’s highest-earning mobile games for June, as the Chinese tech giant invests heavily in the business that makes up much of its revenue.

Last month, Honor of Kings, a multiplayer role-playing battle game developed by Tencent’s Timi Studio, pocketed $277 million in revenue, up 21% year-on-year, maintaining its status as the world’s highest-grossing mobile game for four consecutive months, according to SensorTower.

The Chinese mainland was the largest revenue source for Honor of Kings, contributing approximately 95.6% of the game’s June revenue, followed by Taiwan and Thailand with 2% and 1.2% respectively.

PUBG Mobile, a battle royale mobile game developed by Tencent’s Lightspeed & Quantum Studio, claimed the second spot with revenue of $213.8 million, about 53.3% of which came from the mainland, followed by the U.S. with 11.2%.

In June, the combined revenue generated by the world’s 10 highest-earning mobiles games amounted to $1.4 billion, meaning that Honor of Kings and PUBG Mobile accounted for about 35%.

In recent years, Tencent has redoubled efforts to snap up game studios to take on rivals from home and abroad. On Monday, Bloomberg reported that the Shenzhen-based company, which already has stakes in giants such as Riot Games and Epic Games, has agreed to buy the 91.25% of British videogame developer Sumo Group that it does not already own.

Related: Tencent Agrees to Buy British Game Maker Sumo Group

Contact reporter Ding Yi (yiding@caixin.com) and editor Heather Mowbray (heathermowbray@caixin.com)