Sure, here is a list of some games that are still playable and accessible online even though I no longer pay for any subscription:
-Master Hunter World -Wolfenstein II -Grand Theft Auto V -Watch Dogs Legion -Resident Evil VII -Last of Us -God of War
There are a few more, but some I assume fall into that category, like COD. I do get a frequent notice encouraging me to subscribe or I may not be able to access some features or games but I have yet to run into that with existing stuff.