PUBG might be losing some ground to Fortnite, but the game remains a juggernaut. According to Valve boss Gabe Newell, the battle royale game is Steam's third highest-selling game of all time. He revealed the detail during a presentation this weekend, according to IGN.

"You can have a relatively new game like PUBG, and [...] they can capitalize on all the other multiplayer games, and all of the technology, [and] the fact that China is now a huge market for anybody who does PC game development," Newell apparently said. "So PUBG can come out of pretty much nowhere and become the third largest selling game on Steam's history. Their gross revenue over all-time is already number three in fairly short order."

It is not immediately clear what the No. 1 and No. 2 best-selling games on Steam are, and Valve may never say.

Indeed, PUBG was only released on Steam through Early Access in March 2017. The game left Early Access in December with the launch of the 1.0 edition. Though the game is officially released, developer PUBG Corp. continues to support the title with regular updates as part of its games-as-a-service approach. Just recently, the studio laid out its development roadmap for 2018, and this includes a new map, emotes, and lots more.

The last figure we heard for PUBG sales was 30 million, which is remarkable. Though player figures have dropped, the game remains popular on a level that the video game industry has almost never seen. On Steam, the game had an unthinkable 2.46 million peak concurrent players today, which is significantly ahead of the No. 2 game, DOTA 2, which had a peak concurrent player figure of 573,511 on Steam today. Notably, DOTA 2 is a free-to-play game, while PUBG costs $30.

PUBG is also available on Xbox One (where it's reached millions of players) and a PS4 version sounds likely. In fact, PUBG Corp. has said it wants to launch the game everywhere, while movie and TV shows based on the game are also being considered.

For more on PUBG, check out GameSpot's video above in which editors talk about how the game may need to evolve in the wake of pressure from Fortnite and other similar games.