Crazes come and go on Steam but few games ever get close to unseating Dota 2 at the top of the concurrent-players table - until now. After days of threatening it, PlayerUnknown's Battlegrounds has had more players than Dota 2.
It was a fleeting moment and Dota 2 has since reclaimed the top spot but Steam's prime-time 'peak today' numbers, from the past 48 hours, show PUBG with 877,844 players and Dota 2 with 838,519.
Dota 2 is a free-to-play game whereas PUBG, still an Early Access game, costs £27.
It was only just under a month ago PUBG became the most played non-Valve game on Steam, surpassing giants such as Grand Theft Auto 5 and Fallout 4 but still far behind the permanent fixtures of Counter-Strike: Global Offensive and Dota 2 in the top two spots.
But 'most played' is a different measure to 'peak today'. It's an all-time peak concurrent player count. In those stakes PUBG's peak of 877,844 concurrent players has now surpassed CS:GO's record of 850,485 players, but there's a long way to go to Dota 2's staggering record of nearly 1.3 million players.
So-hot-right-now PUBG has been courted by Microsoft already, as a "console launch exclusive" for Xbox One - one of the bigger announcements from Gamescom last week. It doesn't sound as though a PlayStation 4 version is currently in development but no one has ruled the possibility out.