Running PlayStation 2 games directly inside a web browser is still a pretty ambitious idea. PS2 emulation itself is demanding enough on a desktop application, so trying to make it work smoothly through WebAssembly and a browser adds another layer of challenges. Nevertheless, we have been continuing to work on our PlayStation 2 Web Emulator, and this latest update brings some of the biggest improvements we have made so far.
The emulator has now been updated to the latest build we are currently using, Play! 0.77-9-ge9aa5ace, together with our own custom browser-specific modifications. More importantly, this is no longer simply a standard Play! build running inside a browser. We have added our own controls and optimisations specifically aimed at getting better performance from browser-based PS2 emulation.
A New Custom Play! Build
The latest version is based on Play! 0.77-9-ge9aa5ace, but we have made several customisations around it for our web deployment. Our build includes browser controls for frame skipping, EE speed and audio buffering, allowing us to tune the emulator depending on how demanding a particular game is.
This matters because there is no single configuration that works perfectly for every PlayStation 2 game. Some titles need more accurate CPU timing to work correctly, while others benefit significantly from sacrificing a little accuracy or graphical smoothness in exchange for additional performance.
Instead of forcing everybody to experiment with individual settings, we have introduced three easier performance options.
Three Performance Modes
Users can now choose between Compatibility, Balanced and Performance modes. Each profile adjusts the Emotion Engine speed and rendering behaviour differently.
For most games, we recommend starting with Balanced mode. If a game is struggling, Performance mode is worth trying. Compatibility mode is available when a game behaves incorrectly with the faster configurations.
Final Fantasy X Is Finally Playable
One of the most noticeable improvements can be seen with Final Fantasy X, which was one of the games we previously deployed for testing.
In our earlier PS2 Web Emulator build, the game technically ran, but performance could become horrible during certain sections, particularly when the game was rendering its FMV sequences. The slowdown was severe enough that the overall experience wasn't something we would really describe as comfortably playable.
With the latest emulator build and our new performance optimisations, Final Fantasy X now performs considerably better. FMV playback is much faster than before and general gameplay is significantly more usable.
Is it perfect? No.
But is it playable now? Yes.
There are still occasional performance drops and emulation imperfections, so this should not be compared with running Final Fantasy X through a mature native desktop emulator on powerful hardware. For something running entirely inside a web browser, however, the improvement is substantial.
Save and Load Games Are Now Supported
Another major addition is something that makes actually playing longer PS2 games much more practical: Save and Load functionality.
Yes, you can now save your game.
The emulator now includes memory card support, with the virtual PlayStation 2 memory card being stored using Browser FileStorage. This means that when a game uses its normal in-game PlayStation 2 saving system, that save can actually be retained.
For example, when Final Fantasy X asks you to save at a save point, you can save just as you would on an actual PlayStation 2. The emulator writes that information to its virtual memory card, and the browser keeps the memory card data available for future sessions.
We have also added dedicated Save/Load functionality, giving players another way of preserving their current gameplay session.
This is an especially important improvement for RPGs and other games designed to be played across many hours. Previously, being able to launch a PS2 game in the browser was interesting as a technical demonstration. Persistent saves make the emulator much more useful as something you can genuinely play.
Performance Has Improved, but Game Compatibility Still Varies
A lot of performance enhancement work has gone into this release, but it is important to set realistic expectations. PlayStation 2 emulation in a browser is still extremely demanding, and game performance varies considerably.
Some titles work surprisingly well, while others remain far from playable.
One particularly difficult example is the Need for Speed Underground series. We tested these games with the updated emulator, and unfortunately their performance remains extremely poor. At the moment, we would consider them unplayable through our web emulator.
Changing between Compatibility, Balanced and Performance modes can alter the results slightly, but it does not solve the fundamental performance problems with these games.
That is very different from Final Fantasy X, which we would currently categorise as playable but not perfect.
This is why the new performance profiles are useful, but they should not be seen as a magic switch that makes every PS2 game run at full speed. Different PlayStation 2 games use the original hardware in very different ways, and some workloads are significantly harder to emulate inside a browser.
Dance Dance Revolution Performs Extremely Well
Interestingly, some games perform much better than we initially expected.
We tested several Dance Dance Revolution titles and found them to be very playable, with very good overall performance. Gameplay is responsive, rendering performance is good and the experience feels considerably closer to what we would expect from a properly playable emulator.
This also demonstrates why we cannot judge the emulator based on one or two particularly demanding games. A game such as Need for Speed Underground may perform terribly, while another PlayStation 2 title can run extremely well using the exact same browser and hardware.
As we continue testing additional games, we will have a much clearer picture of which parts of the PS2 library are suitable for browser-based emulation.
Game Controllers Are Now Supported
Another addition we really wanted was proper game controller support.
Playing a PlayStation 2 game with keyboard controls works for testing, but it is definitely not the ideal way to experience these games. The latest version now supports compatible browser game controllers, making the experience feel significantly more natural.
We have personally tested the emulator with:
So far, both controllers have been working well.
Controller support is particularly useful for games such as Dance Dance Revolution, racing games, fighting games and action titles where analogue controls and multiple simultaneous button presses are much more comfortable on a physical controller.
Of course, browser controller support can still vary depending on the controller, operating system and browser being used, but our initial testing has been very positive.
Desktop Only — At Least for Now
For the moment, we are restricting our PlayStation 2 Web Emulator to desktop browsers only.
Technically, mobile browsers have become incredibly capable, but PS2 emulation is already pushing browser-based WebAssembly execution quite hard on desktop hardware. Between CPU requirements, GPU rendering, memory usage, touchscreen controls and the overall complexity of the emulator interface, we currently don't see a practical reason to enable it for mobile devices.
Even if we could technically make the emulator launch on a phone, that doesn't necessarily mean it would provide a good gaming experience.
For now, therefore, desktop remains the intended platform.
What Has Changed in This Update?
To summarise, this PlayStation 2 Web Emulator update includes:
There Is Still Plenty of Work Ahead
Probably the most important thing to understand about this project is that browser-based PlayStation 2 emulation is still a work in progress.
We have made a lot of performance improvements, and the difference compared with our earlier deployment is already very noticeable. Final Fantasy X going from an experience with horrible FMV performance to something we can now genuinely call playable is a particularly encouraging result.
At the same time, games such as Need for Speed Underground remind us how demanding PS2 emulation can be. Some titles simply aren't ready for browser play yet, regardless of how aggressively we adjust the performance settings.
The good news is that we are now reaching the point where an increasing number of games aren't merely launching — they are actually playable.
Final Thoughts
The goal of the PlayStation 2 Web Emulator has always been a slightly crazy one: open a browser, launch a PS2 game and start playing without installing a traditional emulator.
We're getting closer.
With the latest Play! 0.77-9-ge9aa5ace base, our custom performance controls, three performance profiles, significantly improved Final Fantasy X performance, persistent memory cards, Save/Load support and proper game controller support, the emulator feels much more complete than our earlier builds.
There are still plenty of games that will struggle, and we certainly aren't claiming that browser-based PS2 emulation can replace a dedicated desktop emulator. But seeing games such as Final Fantasy X become genuinely playable and Dance Dance Revolution running with very good performance shows just how far this experiment has progressed.
We'll continue testing more PlayStation 2 games, experimenting with performance settings and improving the browser build wherever possible. Some games will work brilliantly, some will work with compromises, and some — like Need for Speed Underground at the moment — will probably make the browser beg for mercy.
And honestly, finding out which category each PS2 game falls into is part of the fun.
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