First videogame with 3 million concurrent players on Steam

First videogame with 3 million concurrent players on Steam
Who
PLAYERUNKNOWN'S BATTLEGROUNDS
What
First
Where
Not Applicable
When
09 February 0018

The first videogame to reach 3 million concurrent players on Steam is PLAYERUNKNOWN'S BATTLEGROUNDS (Bluehole, Inc.), which achieved a peak of 3,236,027 gamers playing at the same time on 13 January 2018. It achieved this despite the game, a battle royale survival shooter, still being in Early Access (essentially still in development). The game was also the most actively played game on Steam overall.