EmuFive: a PS5 game runs on a jailbroken PS4
By Tgames · · 2 min read
EmuFive runs the KytyPS5 PS5 emulator under Linux on a jailbroken PS4: God of War Sons of Sparta goes past 40 fps on a PS4 Pro. Experimental project.
A PS5 emulator on PS4
Chokri Hammedi (blue0x1) released on November 9, 2026 version 1.0.0 of EmuFive, described as "a PS5 emulator for the PS4". It is a small 265 MB Linux system, under the GPL-2.0 license, that boots straight into a home screen driven by the controller. It brings together three parts:
The real obstacle: the CPU
KytyPS5 does not emulate the PS5's CPU: it runs the game's x86-64 code directly. But PS5 games use the AVX2, FMA and BMI2 instructions of the Zen 2, which the PS4's Jaguar lacks. An EmuFive patch rewrites them into older instructions when the game loads, and each replacement is checked on a PC against the original instruction.
The result, according to the author: God of War Sons of Sparta runs at 40 fps and more on a PS4 Pro. Other games are still being tested, and many are still slow.
What EmuFive offers
What you need
Caution
The project is experimental. Fake PS5 emulators carrying malware are going around on GitHub; EmuFive, on the other hand, is open source, built on KytyPS5 and published by an account active since 2019. Download it only from its GitHub page. After the payload starts, the screen can stay black for 1 to 2 minutes: this is normal. For PS4 games on PC, see shadPS4.
Sources: EmuFive (GitHub) · Version 1.0.0 (GitHub) · PS4 Multiboot (GitHub) · KytyPS5 (GitHub)
A PS5 emulator on PS4
Chokri Hammedi (blue0x1) released on November 9, 2026 version 1.0.0 of EmuFive, described as "a PS5 emulator for the PS4". It is a small 265 MB Linux system, under the GPL-2.0 license, that boots straight into a home screen driven by the controller. It brings together three parts:
- PS4 Multiboot, by the same author, which starts Linux on a jailbroken PS4;
- a build of Mesa that gives Vulkan 1.3 to the PS4's graphics chip;
- KytyPS5, an open-source PS5 emulator, recompiled for the PS4's Jaguar CPU.
The real obstacle: the CPU
KytyPS5 does not emulate the PS5's CPU: it runs the game's x86-64 code directly. But PS5 games use the AVX2, FMA and BMI2 instructions of the Zen 2, which the PS4's Jaguar lacks. An EmuFive patch rewrites them into older instructions when the game loads, and each replacement is checked on a PC against the original instruction.
The result, according to the author: God of War Sons of Sparta runs at 40 fps and more on a PS4 Pro. Other games are still being tested, and many are still slow.
What EmuFive offers
- a home screen driven by the controller, with up to 8 profiles, trophies, play time and screenshots you can fetch through a QR code;
- games from a USB drive (PS5 folder, preferably exFAT), the PS4's drive read-only or a shared folder on a PC;
- installation on the PS4's drive (28 GB free) or on an 8 GB USB drive, and updates from the settings.
What you need
- a jailbroken PS4 with GoldHEN, for its FTP server and payload loader (see our GoldHEN tutorial); only the PS4 Pro has been tested;
- the PS4 Multiboot files and the EmuFive package, copied over FTP, then the Linux payload to launch;
- your own PS5 games, dumped by you: EmuFive provides none, nor the PS5 system software.
Caution
The project is experimental. Fake PS5 emulators carrying malware are going around on GitHub; EmuFive, on the other hand, is open source, built on KytyPS5 and published by an account active since 2019. Download it only from its GitHub page. After the payload starts, the screen can stay black for 1 to 2 minutes: this is normal. For PS4 games on PC, see shadPS4.
Sources: EmuFive (GitHub) · Version 1.0.0 (GitHub) · PS4 Multiboot (GitHub) · KytyPS5 (GitHub)
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