http://hexus.net/gaming/news/pc/1101...layer-records/

On Saturday hit game PlayerUnknown's Battlegrounds broke the Steam game concurrent players record, previously held by Dota 2. SteamSpy Tweeted that there were 1,322,507 concurrent players of PUBG. That figure was the first time Dota 2's record peak of 1,291,328 has been breached. Looking at SteamCharts it seems like SteamSpy Tweeted a little early, as it charts the top figure for PUBG concurrent players on Saturday as being as high as 1,348,374.