Although Half-Life 2 is a production that changed the game world, it is not one of the games with the highest sales numbers you can see. We even know that the game exceeded 10 million sales exactly 4 years ago. However, the Half-Life community organized an interesting event to make the game more memorable.
Half-Life 2 fans, who listened to the invitation of a community called Lambda Generation, heavily participated in the event called Breaking the Bar. The game, which had a peak concurrent player count of 6.882 on SteamDB until the event, hosted 16.101 simultaneous players during the event last Saturday.
In fact, it is not possible to assume the highest numbers of the game because, as you know, there was no system at that time to track simultaneous players like SteamDB. However, we can still say that this new number is proud.