Play PS Plus game without PS Plus?

As
- in PlayStation
4

I downloaded Batman: The Telltale Series when I had PS Plus. I played it too and stuff. Now I have no PS Plus, and I can no longer play PS Plus games, except Batman: The Telltale Series. Why is it the only game I can play without PS Plus? If I want to play other PS Plus games, it says: "The content can't be used. Your Playstation Plus subscription has expired."

So I know that I can't play PS Plus titles without PS Plus, but my question is why I can play this game without PS Plus. I don't think I bought it by mistake…

Th

You don't need PS + to play

As

It was only free for PS Plus owners, at the moment the game costs something?

Na

If the game was free by ps plus you need ps plus to play it

As

I don't have a PS Plus and can still play it.