Some of them, not all of them. But if your PS plus expires I believe you can't play the games until you renew it. (Assumption here)
Free Step Dodge
DestructionBomb
Rikuto
If PS+ expires you eventually lose access to them.
Russian-chiropractic19
its supposed to expire today but i was able to jump online after so i cant tell if that's the issue or not.
Force_of_Nature
You need to be logged online in order to use games acquired for free from PS+