https://www.polygon.com/2017/9/27/16374800/fortnite-battle-royale-player-count

Fortnite’s foray into the Battle Royale genre appears to be off to a strong start. Epic Games announced today that more than one million players took part in Fortnite Battle Royale on launch day, Sept. 26.

The game’s closest competitor (and Fortnite Battle Royale’s most prominent inspiration), Playerunknown’s Battlegrounds, is still far ahead of Epic’s game with more than 1.4 million concurrent players today, according to Steam. But Fortnite’s new 100-player PvP mode might catch up to PUBG soon enough.