PS5 backwards compatibility is one of the console's most practical selling points, but it's also one of the most misunderstood. Sony confirmed at launch that the PS5 plays "the overwhelming majority" of the more than 4,000 PS4 titles, and that figure has held up. What hasn't been spelled out clearly is everything the system won't do, and the situations where a game technically loads but performs badly or loses features.
What PS5 backwards compatibility actually covers
The PS5 runs PS4 and PS4 Pro games from disc and from the PlayStation Store using the PS4 game emulation layer built into the console's operating system. Most titles benefit from faster load times, thanks to the PS5's custom SSD. Some titles receive a locked or boosted frame rate under Game Boost, Sony's feature that applies to a curated list of PS4 games to push them toward 60fps or higher. The PlayStation Store identifies which titles are covered by Game Boost.
PS4 games you own digitally through your PSN account transfer over without any re-purchase. Physical PS4 discs play on the standard PS5 disc edition, though not on the PS5 Digital Edition, which has no disc drive. That distinction catches buyers out more often than it should.
HDR output also applies to PS4 games on PS5. The console maps the older title's signal through its own HDR tone-mapping, so games without native HDR support can still benefit from the display upgrade. The improvement is inconsistent across titles, but on a capable TV the difference is visible.
Where the gaps appear
The PS3, PS2, and PS1 libraries are where backwards compatibility ends entirely. The PS5 does not play physical media from those generations, and original discs won't load. Sony offers PS3, PS2, and PS1 titles through PlayStation Plus Premium's game catalogue as streamed titles, but that's a streaming service, not true hardware backwards compatibility. Streaming requires a stable internet connection and carries latency you'll notice in fast-paced games.
The incompatible PS4 titles list is short but worth checking. Sony published a list of PS4 games that don't work on PS5, and at launch it included titles like Just Dance 2020, which relied on the PS4 camera peripheral. Certain games that depended on hardware-specific accessories from the PS4 era also fell off the compatibility list.
PSVR is another friction point. Original PSVR games require the PlayStation Camera adaptor to run on PS5, and that adaptor was available only by request from Sony. PSVR 2 does not play original PSVR titles at all. Those two VR ecosystems are completely separate, and Sony hasn't bridged them.
Game Boost and enhanced performance: not automatic
Game Boost doesn't cover every PS4 title. Sony curates the list, and it skews heavily toward first-party and major third-party games. If a PS4 title you own isn't on the Game Boost list, it runs at its original PS4 performance profile. That's usually fine, since the SSD still cuts load times, but don't assume every old game will suddenly hit 60fps.
Some PS4 games received separate PS5 upgrades, either free or paid. Ghost of Tsushima Director's Cut, God of War, and The Last of Us Part I all arrived with dedicated PS5 versions that delivered native performance improvements well beyond what Game Boost could offer. Those are distinct products, not the same as backwards compatibility. Checking whether a game you want has a native PS5 version versus relying on Game Boost is worth doing before you buy.
It's also worth noting that PS4 games running under backwards compatibility can't use PS5-specific DualSense haptic feedback or adaptive triggers. Those features require a native PS5 build. You'll still use your DualSense controller, but it operates in its basic mode for PS4 titles.
Practical tips for Australian PS5 owners
The PlayStation Store clearly labels whether a title is a PS4 version, a PS5 version, or a cross-gen bundle. Read those labels carefully before purchasing. A PS5 version of a game listed separately in the store will give you native performance. A PS4 version played on PS5 gives you backwards compatibility performance, which is mostly good but not the same thing.
If you're weighing whether the hardware upgrade delivers enough value, our breakdown of PS5 Pro vs PS5 covers how the performance gap plays out across generations of titles, including backwards compatible games.
Saves from PS4 games generally transfer to the PS5 if you're playing under backwards compatibility. They don't automatically carry to a PS5 native version of the same game. Sony made save transfer tools available for several major titles at launch, but implementation varied by developer. Check the game's support page before assuming your progress moves across.
For PS4 disc owners, the upgrade path can involve cost. Some publishers offered free PS5 upgrades for PS4 disc buyers. Others charged an upgrade fee. A handful required a full re-purchase of the PS5 native version. There's no platform-wide rule here, so it pays to check the specific publisher's policy for any disc you own.
What backwards compatibility doesn't solve
Backwards compatibility handles most of your PS4 library. It doesn't fix games that were abandoned by developers, or multiplayer titles where the PS4 servers have been shut down. If the online component of a PS4 game is gone, loading that game on PS5 won't bring it back.
It also doesn't expand your access to the full PS5-exclusive library, which has grown into a meaningful catalogue of titles you simply can't get anywhere else. If you're evaluating what the PS5 generation has produced, our look at PS5 exclusives in 2026 covers the standouts and the titles that didn't justify the hype.
Backwards compatibility is best understood as a safety net for your existing library, not a primary feature. It's well-implemented for PS4, essentially absent for PS3 and earlier, and surrounded by enough asterisks that a bit of research before assuming a title will work as expected is always time well spent.