LogFAQs > #965962716

Usually games with a price (and no prior background) need momentum to gain popularity as people need to be convinced that it's worth buying. Free games often experience their peak popularity right at the beginning since there's no risk and everyone plays at once. That's what I thought happened with Fall Guys.

Though being free on PS probably explains it. Enough free players made the content for everyone else to watch and consume, so people on other consoles bought it based on that.