SharpEmu brings early PS5 emulation to Steam Deck with Astro’s Playroom test

PS5 emulation has now reached the Steam Deck, although nobody should expect to start playing PlayStation 5 games on Valve’s handheld just yet. The SharpEmu emulator has managed to boot Astro’s Playroom on the Steam Deck under SteamOS. That’s the good news. The less exciting part is performance. The game runs at roughly 0.6 frames per second during the demonstration, which means you’re looking at one new frame every couple of seconds. So yes, it runs. But only just. Still, this test gives us a useful look at how far PS5 emulation has come. SharpEmu can now start real PlayStation 5 software on a Linux-based handheld PC, render part of the game and keep the process running instead of immediately crashing. That’s what matters here.

SharpEmu gets PS5 software running on Steam Deck

SharpEmu is an open-source PlayStation 5 emulator written in C#. Unlike some other PS5 emulation projects, it isn’t tied to Windows. It also supports Linux and macOS, which makes the Steam Deck an obvious machine to test.

The demonstration runs through the Steam Deck’s desktop mode. Astro’s Playroom gets far enough to show the PlayStation Studios screen, but the frame rate stays below 1 FPS for much of the test. Audio doesn’t work properly either, with playback breaking up as the emulator struggles to keep everything moving. In other words, you can’t play it.

That distinction matters because videos like this can easily make PS5 emulation look further along than it really is. SharpEmu isn’t turning the Steam Deck into a portable PS5. Right now, it’s proving that the emulator can load PS5 software, process enough of the game to reach rendered graphics and survive long enough to show something on screen. That’s a much smaller step, but it’s a real one.

Why 0.6 FPS isn’t as pointless as it sounds

A game running at 0.6 FPS sounds almost useless, and from a gaming perspective, it is. Most console games target 30 or 60 FPS. At 0.6 FPS, controls, animation and normal gameplay simply aren’t practical. But emulator development doesn’t start with smooth frame rates.

First, developers need to make the software understand what the original console is doing. That includes loading executable code, managing memory, handling system calls, translating graphics instructions and keeping the game from crashing. Speed comes later.

That’s why this Steam Deck test is better viewed as a compatibility milestone. SharpEmu has reached the point where a commercial PS5 title can start and display graphics on hardware that was never designed to run it. There’s still a huge amount of work between that and proper gameplay.

SharpEmu takes a different approach from Kyty

SharpEmu isn’t the only PS5 emulator being developed. Kyty is another project that has already shown several 3D PlayStation 5 games running. In some areas, it’s further ahead when it comes to getting software on screen. The difference is platform support.

Kyty mainly targets Windows. SharpEmu has taken a broader route and works across Windows, Linux and macOS. That gives it an obvious advantage for devices such as the Steam Deck, which runs a Linux-based operating system by default.

SharpEmu has also been tested on Apple Silicon Macs using Rosetta 2, while Windows on Arm systems can run it through Microsoft’s Prism translation layer. There has even been work on an unofficial Android version.

None of that automatically makes SharpEmu faster or more compatible. It simply means the project is being designed to run across a wider mix of hardware and operating systems. For a device such as the Steam Deck, that matters.

Steam Deck PS5 emulation is still a long way from playable

The main thing to keep in mind is simple: this isn’t practical PS5 emulation yet. Getting a loading screen at less than 1 FPS is very different from running a complete game at a stable frame rate. The emulator still needs major improvements in graphics handling, CPU performance, memory management, audio, system functions and general compatibility.

The Steam Deck also has its own limits. Its AMD hardware works well for a handheld PC, but PS5 games were built around a much more powerful console with different system behaviour and hardware targets. That means SharpEmu has plenty of work ahead.

Even so, the demonstration gives the project a clear starting point. Astro’s Playroom now boots on Steam Deck hardware. Graphics appear. The emulator keeps running. For now, that’s the story. PS5 emulation on the Steam Deck exists, but only at an experimental level. SharpEmu can get real software moving, even if that movement currently happens at around 0.6 frames per second. The next challenge is turning basic execution into something faster, more stable and eventually usable.

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