https://thenextweb.com/gaming/2020/10/09/sony-reveals-list-ps4-games-wont-work-playstation-5/

Sony today finally clarified which, out of the thousands of PS4 games, won’t work on the PlayStation 5. Thankfully, the list is mercifully small, though even the games that work might have some problem. Still, if you’re getting the PS5 a month from now, there are only a handful of games you won’t be able to play.

A PlayStation support article titled “Backwards compatibility” clarifies that the “overwhelming majority” of PS4 games will be playable on PS5. It also adds that some of the games will benefit from Game Boost, which will make them run at higher frame rates, but doesn’t specify which games those will be. According to the article, you should be able to pop your disc into the PS5‘s disc drive, or download it from your game library depending on which version of the console you have, and be able to play it.