If you’re not familiar with Stray, it’s a PS4/PS5 game where you play as a cat. It’s a very short game; the main story can be beaten in an afternoon. However, it’s available on PS+ (although going away soon), and can be purchased outright for <$30.
It’s the first time in a long time where I felt totally delighted by how innovative and different a video game was. First of all, playing as a cat isn’t just a cute gimmick. The level designs are all about navigating around slums using your size and acrobatic abilities of a cat.
Second, the world that the devs have created is so cool. It’s like some sort of cyberpunk version of Kowloon Walled City.
This game is not Elden Ring. But for an afternoon, it’s absolutely worth your time. I can’t recommend it enough. Especially if you are finding yourself burned out by the usual types of games. I hope the devs follow up with something else adjacent to this game!
The OP’s reply didn’t completely explain it, so: you need the PS+ “Extra” subscription in order to get the game “for free”. Even then though, you don’t really get the game forever - the PS+ Extra tier subscription has a few dozens of games available on its catalog that are swapped every few months, a-la Netflix content. Once the game gets removed from the Extra catalog, you’ll get an error message if you still have it installed and try to play it, and then you actually have to buy it if you want to keep playing.
If you’ve got the “base” subscription (the “Essentials” tier) you can’t get the game for free at all. On the other hand, you get 3 assorted games for free every month, and in this case they remain yours forever once you claim them in the month they’re made available on the Essentials catalog, but only for as long as you’re subscriber on PS+. Those 3 free monthly games are also available for the higher tiers.