PS5X Emulator Brings PS5 Games to Xbox Series X
The PS5X emulator has achieved something that once seemed impossible: it booted PlayStation 5 games on an Xbox Series X. Developer Devran Cosmo Uenal demonstrated the feat in a YouTube video published on September 8, running the PS5 version of Quake II on Microsoft’s console with an Xbox controller. PS5X is Uenal’s Xbox port of KytyPS5, an open-source PS5 emulator, and he has since gotten three more PS5 games working alongside Quake II. It is an impressive technical achievement, but a significant limitation keeps it from being useful for most players.
The Catch: Developer Mode’s 5GB Memory Cap
The PS5X emulator only works in the console’s official Developer Mode. Microsoft’s documentation caps games in that mode at 5GB of memory, which rules out the majority of current-gen titles. There is also no public download available yet, so other Xbox owners cannot try it themselves.
How the PS5X Emulator Works
Sony and Microsoft built their current consoles around closely matched AMD hardware. Both feature eight Zen 2 CPU cores, RDNA 2 graphics, and 16GB of GDDR6 memory. PS5 games are compiled for the same x86-64 processor architecture that PCs use, which allows KytyPS5 to run their code on the host CPU rather than recreating the PS5’s hardware in software. The emulator’s developer calls it a compatibility layer. In practice, it behaves more like a translator, converting what a PS5 game asks for into something the host machine can understand.
KytyPS5 translates the PS5’s graphics commands and recompiles its shaders for Vulkan, so it requires a Vulkan 1.3 graphics card on PC. Xbox Developer Mode only supports DirectX 11 and DirectX 12, however. “Since Vulkan isn’t supported, everything needs to be translated to DirectX,” Uenal wrote in the YouTube video’s description, where he also admitted that AI was involved in the work. That means fixes the KytyPS5 team makes to its PC renderer must be adapted before the PS5X emulator can use them.
A Research Project, Not a Product
Uenal’s video describes the project as a “research project” for “running PS5 homebrew and game backups” on a Series X in Developer Mode. He claims it doesn’t include any PS5 firmware or decryption keys, and KytyPS5’s documentation tells users to stick to game files they’ve obtained legally. Dodging copy protection is ultimately what killed the Switch emulator Yuzu, whose makers settled a Nintendo lawsuit in 2024 by paying $2.4 million and shutting the project down. The team behind the PS3 emulator RPCS3 lists KytyPS5 and SharpEmu as the two active open-source PS5 emulators that can boot games, and warns players about scam sites posing as real ones.
What Games Can the PS5X Emulator Run?
At the time of writing, the PS5X emulator runs the PS5 versions of four games:
GEX Trilogy
Hellboy: Web of Wyrd
Marvel Cosmic Invasion
Quake II
All four are compatible with Xbox controller inputs, and some have working sound. Quake II reportedly runs at roughly 25 to 45 frames per second in Uenal’s footage. Notably, all four games are also sold on other platforms, so there’s no sign yet of the emulator running a PS5 exclusive. Uenal admits it’s early days and that compatibility is limited.
Android Authority reported on September 28 that KytyPS5 now goes in-game in a variety of PS5 titles on PC, and that one user had shown Marvel’s Wolverine reaching its main menu, in slow motion, on a machine with an NVIDIA RTX 5090. That clip didn’t show any gameplay, and it’s unclear whether it used the standard emulator build. PS5 emulation on PC is becoming more viable by the week, but it remains an extremely nascent field. The PS5X emulator only inherits progress once each fix has been rebuilt for DirectX and squeezed into a far smaller memory budget.
Why Developer Mode’s Memory Limit Matters
Microsoft limits games in Developer Mode to a relatively small 5GB of memory, and apps to 1GB. Requests for more memory than that allocation fail. By contrast, a retail Series X game gets 13.5GB of the console’s 16GB, with the remainder reserved for the console’s OS. That leaves the PS5X emulator with about 37 percent of the memory a normal Xbox game can use, making it an obvious no-go for big current-gen releases. Microsoft only lifts this cap when software runs via the Visual Studio debugger, a setup designed for developers testing their code.
Microsoft’s Stance on Emulators
Microsoft blocked emulators entirely in Xbox’s normal retail mode back in 2023. Its rationale was a store policy that bans products which emulate a game system. The company then started enforcing the ban and reportedly handed out 15-day suspensions to players who found a workaround. Since then, players who want to play PS2 or GameCube games through emulators like Dolphin, the most popular GameCube emulator, have had to rely on Developer Mode instead. But a console in that mode can’t load retail games until it’s switched back.
The Xbox Series X shares the same Zen 2 architecture, RDNA 2 graphics, and memory capacity as a PS5. The PS5X emulator can use less than a third of that memory, and none of it really matters because of the cap. There’s no real workaround without a jailbreak, meaning Xbox players won’t benefit from the progress being made on PC. The PS5X emulator is interesting, but it will remain a cool curiosity rather than anything substantive players can use. If you’re interested in checking out PS5X and similar emulation projects, exercise caution. Scammers are capitalizing on the interest these projects receive, such as releasing malware under similar names like PCS5X to trick players into downloading it.
