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Article: At 4:00 pm CET, Hollow Knight: Silksong launched, and millions of players rushed to digital stores to purchase or install it on PCs and consoles. The same happened with Game Pass on Xbox and PC.
For a few minutes, it was impossible, as the release triggered the crash of Steam, preventing access to the game's page or purchase.
Here is the steam chart from launch

Here it is currently:
Quite an impressive launch for this game. $20 is an absolute steal. I'm not a big fan of metroidvania games, but I'll have to try this one.