Perhaps the strangest part is that this peak happened in the middle of the afternoon for those in the United States, potentially indicating that the game has a larger player base in other regions around the globe.
The player total specifically peaked at 151,253 players on Friday, June 25. For the first time ever, the game accumulated over 150,000 players at a single time, which is something that has never been done in the history of TF2. According to Steamdb, which is a website that tracks active players across games through Valve's Steam platform, Team Fortress 2 just broke its all-time concurrent player total mere days ago.