http://wccftech.com/playerunknowns-battlegrounds-tops-steam-best-selling-2017/

It appears that PlayerUnknown’s Battlegrounds momentum is growing even more as the title has now taken the first spot at Steam’s Concurrent Player Charts, and has become the best-selling single-platform title of 2017 to date.

PUBG took the first spot on the Steam charts from DOTA 2 with 877,844 players logged in simultaneously – that’s 39.325 players more logged in at once than DOTA 2.