On the steam page it says it is. I wasn't aware that Sony's page says otherwise.

Sony's FAQ previously (on May 3) stated that a PSN account is optional for playing games on PC

On May 4, the day after this shitstorm happened, the FAQ was updated to say that some games on PC may require a PSN account

This was rolled out in absolutely amateurish fashion from start to end. Sony should absolutely be taking heat for this, and no one should be going to bat for them over it.

Again, I only bought this game on Steam and

1) the Steam page made it very clear the PSN is required

2) the game makes it extremely clear with a full screen banner that says you MUST sign in to play.

Honestly, if you bought the game on Steam then Sony's FAQ is irrelevant. If you bought it from Sony then I guess there is some case there.

FYI Buying it through Steam is still buying it from Sony. Steam is just a storefront, Sony is the publisher

Sony's FAQ is absolutely relevant here, and they clearly agreed which is why they changed it

So I guess it's not a great idea to make broad sweeping claims based off your own personal experience.