Developer Devran Cosmo Uenal has demonstrated four PlayStation 5 games running on Xbox Series X through PS5X, an emulator restricted by Developer Mode’s memory limits.
PS5X has no public download. Microsoft’s documentation caps Developer Mode games at 5GB of memory, excluding most current-generation titles.
Uenal’s September 8 YouTube video showed the PS5 version of Quake II running with an Xbox controller. PS5X, his Xbox port of the open-source emulator KytyPS5, also runs GEX Trilogy, Hellboy: Web of Wyrd and Marvel Cosmic Invasion.
All four support Xbox controller inputs, and some have working sound. TweakTown estimated Quake II ran at roughly 25 to 45 frames per second in the footage.
All four titles are available on other platforms; PS5X has not demonstrated a working PS5 exclusive. Uenal said development remains early and compatibility limited.
The consoles share AMD hardware specifications: eight Zen 2 CPU cores, RDNA 2 graphics and 16GB of GDDR6 memory. PS5 games use PCs’ x86-64 architecture, allowing KytyPS5 to execute code on the host CPU rather than recreate PS5 hardware in software.
KytyPS5’s developer describes it as a compatibility layer. It translates PS5 graphics commands and recompiles shaders for Vulkan, requiring a Vulkan 1.3-compatible graphics card on PC.
Xbox Developer Mode supports only DirectX 11 and DirectX 12. “Since Vulkan isn’t supported, everything needs to be translated to DirectX,” Uenal wrote in the video description, acknowledging AI involvement in development.
VideoCardz noted that KytyPS5’s PC renderer fixes must be adapted before PS5X can use them.
Microsoft limits Developer Mode apps to 1GB; requests exceeding memory allocations fail. Retail Xbox Series X games receive 13.5GB, with the remainder reserved for the operating system, leaving PS5X about 37% of a retail game’s allowance.
Microsoft lifts the Developer Mode cap only for software running through the Visual Studio debugger for testing.
Microsoft blocked retail-mode emulators in 2023 under its store policy prohibiting game-system emulation. Players circumventing the restriction reportedly received 15-day suspensions. Developer Mode cannot load retail games until the console switches back to retail mode.
Android Authority reported September 28 that KytyPS5 reached in-game states in several PS5 titles on PC. One user showed Marvel’s Wolverine reaching its main menu in slow motion on an NVIDIA RTX 5090 machine, without gameplay; whether it used the standard emulator build was unclear.
Uenal describes PS5X as a “research project” for “running PS5 homebrew and game backups” and says it contains no PS5 firmware or decryption keys. KytyPS5’s documentation directs users to legally obtained game files.
Copy-protection circumvention contributed to Switch emulator Yuzu’s closure. Its creators settled Nintendo’s lawsuit in 2024, paying $2.4 million and shutting the project.
The RPCS3 team identifies KytyPS5 and SharpEmu as the two active open-source PS5 emulators capable of booting games and warns about impersonation scams. Malware has circulated under similar names, including PCS5X.
Tags: playstationxbox
