This article is based on an article from the Japanese edition of Engadget and was created using the translation tool Deepl.

Sony has finally revealed the PlayStation4 games that won't be playable due to the PlayStation 5's backward compatibility. That's just two titles for the Japanese market and 10 for the North American version.

The company revealed PS4 only games, i.e. PS4 games that are not playable on PS5, on the "Backward compatibility: PlayStation4 games playable on PlayStation5" page. The list of games for Japan/North America is as follows

Games for Japan

  • Robinson: The Journey

  • Joe's Diner

Games for North America

  • DWVR

  • Afro Samurai 2 Revenge of Kuma Volume One

  • TT Isle of Man - Ride on the Edge 2

  • Just Deal With It!

  • Shadow Complex Remastered

  • Robinson: The Journey

  • We Sing

  • Hitman Go: Definitive Edition

  • Shadwen

  • Joe's Diner

Games on the list for North America but not for Japan are those that "have not been released in Japan".

Sony's explanation of PS4 backward compatibility for the PS5 was initially described as "almost all of the top 100 most popular PS4 games" and was later supplemented with "the majority of the 4,000+ PS4 titles will be playable on PS5". Furthermore, in mid-September, there was an official statement that "99 percent" of them can be played on PS5, and now the specific title names have finally been confirmed.

The PS5's backward compatibility is explained to have been achieved through the inclusion of PS4 and PS4 Pro legacy (compatibility) modes in the main processor GPU itself. However, it is believed that it took a long time for PS5 to be officially announced, as the processor's clock speed and other factors have been increased significantly, so each title needs to be tested one by one.

The PlayStation Blog has also provided more information on how to play PS4 titles on PS5. As for the downloadable version, when you sign in to PS5 with your account for PlayStation Network, you will automatically see your library of played PS4 content through the menu, allowing you to play compatible titles.

On top of that, you can also transfer downloaded games and save data from the PS4 to the PS5 via wired or Wi-Fi. In addition, if you've already saved your data to an external USB storage device connected to the PS4, you can use that external storage device to transfer the data, so you won't have to download huge amounts of data from the game console over the internet.

The disc version of the game will still be playable on the PS5 with a disc drive, while the digital edition without the drive will obviously not be playable. However, "you may have the option to upgrade your PS4 game to the digital PS5 version," it says.

It has already been announced that some SIE WWS titles can be upgraded from the package to a digital version of the game, but beyond that, there may be a measure similar to the UMD Passport that was adopted when moving from the PSP to the PS Vita without a UMD drive.

There's also mention of streaming on the PS5.

For one thing, it means that "Remote Play from PS4 to PS5" is possible. That means you can play without consuming storage by transferring your game data to the PS5. However, you won't be able to take advantage of the PS5’s Game Boost through streaming.

The other thing is that it supports PS Now streaming, too. What PS4 lacks in backward compatibility with pre-PPS3 games, it makes up for with PlayStation Now, a subscription service that lets you play past PS titles, and it looks like PS5 will take over.

Its rival, the Xbox Series X, promises backward compatibility from the original Xbox to the Xbox One (to the extent that it was supported by the Xbox One), but the desire to play old games on the PS5 is likely to be fulfilled, provided that you pay for them.

Source: Sony 1, 2

This article is based on an article from the Japanese edition of Engadget and was created using the translation tool Deepl. The Japanese edition of Engadget does not guarantee the accuracy or reliability of this article.