https://www.tweaktown.com/news/59541...ers/index.html

We don't know which platforms have the most users, but I'd dare say the PC version of Overwatch has the lion's share of gamers. Blizzard hit 20 million players in Overwatch back in November 2016, and then 30 million in April this year. PlayerUnknown's Battlegrounds continues to pummel other games into the ground, so it'll be interesting to see how Overwatch's numbers get affected as PUBG continues to grow. Blizzard hasn't revealed any other details about the 35 million Overwatch players, so we don't know if the free weekends count (they probably do). No matter what, 35 million gamers is a big milestone for Overwatch.