Valve Corp.’s video game distribution platform Steam broke its record number of concurrent users on Sunday at 14:20 GMT with 18.8 million users online at one time.

This exceeds the platform’s last record-high of 18.5 million, which was set two years ago on Jan. 14, 2018.

According to SteamDB, most of those users were idle, as in not playing any games, but instead just sitting with the software active. Of those 18.8 million users only around 5.9 million were playing games concurrently. The record-high in January 2018 saw more than seven million players in games.

It’s hard to say what’s attracting more users to the platform right now, but speculation includes the recent upsurge in virtual reality headsets – with about 1.3 million connected to Steam in December. Even the VR game Superhot saw $2 million in sales over the holiday season during 2019.

As for games with the highest concurrent players, over the weekend SteamDB has recorded (in descending order) Counter-Strike: Global Offensive, Dota 2, Grand Theft Auto V, PlayerUnknown’s Battlegrounds, Tom Clancy’s Rainbow Six Siege, and Monster Hunter: World.