I want to create a ReactOS based console OS that can run roblox. What are your guys' experiences using ReactOS? How well would it run roblox?

#1 ROBLOX is a company, not just the one platform.

#2 ROBLOX as you access it is, as near as I can tell, primarily an online game platform. The average client MAY access it using a web browser. ReactOS has excellent browsers available. This calls out for some testing. If all it takes is a browser, then any platform with a browser (Rpie with Raspian?) should serve.

#3 Native launchers are written for multiple platforms, but the Microsoft Windows 10 client is in the Microsoft Store which is a bit Microsoft locked. If you can get that to run on any other OS, more power to you. I would check the licensing for that version of the client launch and see if that would be a legal violation of the terms.

As a proprietary platform for a specific purpose the vendor has no great justification for expending great effort to port clients to an operating system that is still in ALPHA and has a very small distribution based.

It might be worth a try, but ReactOS is still in alpha stages. Not only that, but there are some things that could go wrong:

- The anticheat (what keeps us from being able to play Roblox in Linux in the first place) could be set off
- Honestly with the way ReactOS is built, it might work

- The Roblox Client could detect an unsupported version of Windows and refuse to open.

- The graphics render might not work and just run like crap

With the new Linux Kernel version coming out with that thing that might allow some anticheat software to work on Linux though. I don't know much about it, maybe someone more knowledgeable could post more about it here.

Like you, I would love to play Roblox on a free operating system. That's one of the only reasons I still use Windows sometimes. I would like to hear if Roblox works on ReactOS as well.

Never heard of it - I'm guessing I'm not the target audience ... :shrug:
From their own website.Back on topic, I haven't looked at ReactOS in a couple of years, maybe longer, but found it very bereft of development (and developers) at that time.

That has changed a bit. It now has some sponsorship, and a more active team. Development is still not a roaring rush, but there have been almost startling advances.

It was always intended to be a "driver compatible" with Windows OS, not a "clone" of Windows that would run every single Windows application. That said, the number of Windows specific applications that will run on it with few or no failures is interesting and growing with every release. There is NO incentive for any proprietary software developer to consider compatibility with ReactOS in a favorable light, so most things that run well on it are from among those that do NOT check the windows version and patch level.

Testing is called for, but I would not hold out high hopes.

If testing fails, the more productive effort might be to get the devlopers to support a Linux distribution. Ubuntu, Debian, or Fedora perhaps.
(I would LOVE to see a port running on SPARKY LINNUX - GAME OVER Edition!)

Yep, I have realized it is pretty much impossible to run it on Linux and maybe i will make a more conventional console.

With Linux it is unwise to use the word "impossible", but it might be seriously difficult. It is more difficult of the app developers are actively working against you. It might be instructive to ASK the developers for their opinion (about Linux AND ReactOS operation). It might be equally instructive to just TRY it on ReactOS (if one can do so for free or reasonable investment) just to find out.

it requires a client which you launch from the browser.

ReactOS is not Linux.
Have you tried it?

No. Is it based on BSD or something?

Are you seriously?
Look it up on distrowatch.com.

I did

I don't think so, or you'd've seen this:

No, I looked it up after you told me to.

Then you now know that ReactOS is a functional rewrite of Windows with no Microsoft code that strives to be driver compatible so that it can run most Windows applications. (There are a few that have "DRM" like features that may check if this is really Windows, the supported version, and registered with Microsoft. Clearly that will fail, but all other Windows software should eventually run on ReactOS.)

It is astonishing to me just how much software already "just works" on ReactOS. That said, there are things that do not run at all, and others that run but with one or two features not fully functional. Sometimes you can tell that something that does not work needs a subsystem or driver that is not yet complete. The only way to be sure, is to run a test using the latest release of ReactOS with the software at question. If it fails, the very NEXT release (or the one after) may change that. It is Alpha state software, and a work in progress.