The PS5X emulator is making progress after developer Devran Cosmo Uenal demonstrated that several PlayStation 5 games could run on an Xbox Series X. Built as an Xbox port of the open-source KytyPS5 emulator, the project has successfully launched four games, showing that PS5 software can run on Microsoft’s console under specific conditions.
In a YouTube video published on September 8, Uenal demonstrated the PS5 version of Quake II running on the Xbox Series X with an Xbox controller. Since that demonstration, three additional games have reportedly become playable. However, PS5X remains an early-stage research project and is not currently available as a public download.
Which PS5 Games Work on Xbox Series X?
According to the reported demonstrations, the PS5X emulator currently runs the following four games:
- GEX Trilogy
- Hellboy: Web of Wyrd
- Marvel Cosmic Invasion
- Quake II
All four games support Xbox controller input, while some also feature working audio. Performance varies, and TweakTown estimated that Quake II ran at approximately 25 to 45 frames per second in Uenal’s footage.
These results demonstrate progress in compatibility, but they do not mean the Xbox Series X can now run the full PlayStation 5 library. All four games are also available on other platforms, and there is currently no demonstrated evidence that PS5X can run a PlayStation 5 exclusive.
The developer describes the software as an experimental project with limited compatibility. More development is needed before it could offer a consistent gaming experience.
How Does PS5X Work?
The PlayStation 5 and Xbox Series X share several underlying hardware characteristics. Both use eight-core AMD Zen 2 processors, RDNA 2 graphics technology and 16GB of GDDR6 memory. The PS5 also uses the x86-64 processor architecture found in modern PCs.
These similarities can make it easier to run certain PlayStation 5 software on different hardware. Rather than recreating every component of the original console entirely through software, KytyPS5 uses a compatibility-layer approach to translate instructions for the host system.
On PC, KytyPS5 translates graphics commands and recompiles shaders for Vulkan, which requires compatible graphics hardware and Vulkan 1.3 support.
However, Xbox Developer Mode supports DirectX 11 and DirectX 12 rather than Vulkan. As a result, the PS5X emulator must translate the relevant graphics operations into DirectX-compatible instructions.
Uenal has explained that artificial intelligence tools have also been used during development. Even so, improvements made to KytyPS5’s PC graphics system cannot automatically be transferred to the Xbox version. They may need additional adaptation and testing.
The 5GB Memory Limit Is a Major Obstacle
One of the biggest challenges facing PS5X is Microsoft’s memory restriction for applications running in Xbox Developer Mode.
Under the standard restrictions described in the report, games can use up to 5GB of memory, while applications receive a separate allocation of just 1GB. Requests that exceed the permitted allocation fail.
A retail Xbox Series X game can reportedly access around 13.5GB of the console’s 16GB memory, with the remainder reserved for system operations.
This means the PS5X emulator has access to considerably less memory than a normal retail Xbox game. Many modern PS5 titles require substantial resources for graphics, textures, world environments and other game systems.
Consequently, even if the emulator improves its compatibility, memory restrictions could prevent it from running larger current-generation games reliably. Microsoft permits higher allocations in certain Visual Studio debugging scenarios, but those arrangements are intended for software development and testing.
Without a suitable way to overcome the restriction, PS5X is unlikely to become a practical option for running most demanding PS5 titles on Xbox Series X.
PS5 Emulation Is Progressing on PC
Development is also continuing on KytyPS5 for PC. Reports have described progress in reaching gameplay in several PlayStation 5 titles, while footage has shown Marvel’s Wolverine reaching its main menu on a computer equipped with an NVIDIA RTX 5090.
However, reaching a menu does not demonstrate that a game can run smoothly during actual gameplay. Performance, graphical accuracy and compatibility remain important challenges across PS5 emulation projects.
PS5X faces additional limitations because its DirectX-based rendering approach differs from the Vulkan renderer used by KytyPS5 on PC.
Developer Mode and Legal Considerations
Microsoft blocked emulators from the Xbox retail environment in 2023 under its store policies concerning software that emulates other game systems. Xbox users interested in emulation have generally had to rely on Developer Mode, which requires switching out of the normal retail environment to run development software.
Uenal describes PS5X as a research project intended for homebrew software and legally obtained game backups. He says it does not include PS5 firmware or decryption keys, and KytyPS5’s documentation advises users to use legally obtained files.
Users should also be cautious about unofficial emulator websites and downloads, as fake software can contain malware.
The PS5X emulator represents an interesting development in console emulation, with four PlayStation 5 games reportedly running on Xbox Series X hardware. Its progress highlights the potential of compatibility layers and the similarities between modern gaming systems.
However, limited game compatibility, the absence of a public release and Xbox Developer Mode’s 5GB memory restriction remain significant barriers. For now, PS5X is best viewed as an experimental technical achievement rather than a practical replacement for playing PS5 games on a PlayStation 5 console.
