Running two Roblox instances on the same PC

You can run two separate Roblox games at the same time on one computer by launching the Roblox client twice — once normally and once through a workaround that bypasses the single-instance limit. The standard Roblox launcher prevents multiple windows by design, so you'll need to use the Roblox app's executable file directly or a batch file to open a second instance. Both methods work on Windows; Mac users have fewer reliable options.

The most straightforward approach is to create a batch file that launches Roblox a second time while the first instance is already running. This takes about five minutes to set up and works consistently. You'll need to know where Roblox stores its executable file and be comfortable creating a straightforward text file — no coding knowledge required.

Key Takeaways

  • The standard Roblox launcher blocks a second window, so you must launch the executable file directly using a batch file or command prompt.
  • On Windows, create a batch file pointing to RobloxPlayerBeta.exe in your LocalAppData folder, then run it while your first Roblox window is open.
  • Each instance uses its own login session, so you can play on two different accounts simultaneously.
  • Running two instances uses roughly double the RAM and GPU power, so your PC needs at least 8 GB of RAM and a mid-range graphics card to avoid lag.
  • Both windows will share your internet connection, which can cause lag in online games if your bandwidth is limited.

Finding the Roblox executable file on Windows

Roblox stores its main executable file in a hidden folder on your PC. Open File Explorer and navigate to C:\Users\[YourUsername]\AppData\Local\Roblox\Versions. Replace [YourUsername] with your actual Windows username. If you don't see the AppData folder, click the View tab at the top of File Explorer and check the box labeled "Hidden items" — this reveals hidden folders.

Inside the Versions folder, you'll see a folder with a long string of numbers and letters. Open it. Inside that folder, look for a file called RobloxPlayerBeta.exe. This is the executable you'll use to launch a second instance. Right-click on it and select "Copy as path" — this copies the full file path to your clipboard, which you'll paste into your batch file next.

Creating a batch file to launch the second instance

Open Notepad (search for it in your Windows Start menu). Paste the path you copied, then add a space and the text -app at the end. Your line should look something like this: C:\Users\YourUsername\AppData\Local\Roblox\Versions\version-abc123\RobloxPlayerBeta.exe -app. The -app flag tells Roblox to launch as a separate instance instead of connecting to an existing window.

Save this file to your Desktop with the name RobloxSecond.bat — the .bat extension is important. Make sure you save it as "All Files" type, not as a text file, or it won't work. You now have a shortcut that launches a second Roblox window.

Launching both instances and logging in

Start Roblox normally through the Roblox app or your usual launcher. Once the first game is running, double-click the RobloxSecond.bat file on your Desktop. A second Roblox window will open. You can log in with a different account in this second window, or use the same account if you want to play the same game on two characters.

Both windows will appear in your taskbar. Click between them to switch games. If the batch file doesn't work, try right-clicking it and selecting "Run as administrator" — this sometimes fixes permission issues on Windows.

System requirements and performance impact

Running two Roblox instances simultaneously demands more from your PC than playing one game. Each instance uses between 500 MB and 2 GB of RAM depending on the game's complexity, so you should have at least 8 GB of total RAM available. Your graphics card will also work harder; a mid-range GPU (like an NVIDIA GTX 1050 or AMD RX 6600) can handle two instances, but older or budget cards may struggle.

Both windows share your internet connection, which matters more than you might expect. If you're playing two online multiplayer games, you're sending and receiving data for both simultaneously. A standard home connection (25 Mbps or faster) usually handles this without noticeable lag, but slower connections may cause stuttering in both windows. Close other bandwidth-heavy applications like video streaming or large downloads before playing.

Troubleshooting common issues

If the second window won't launch, the most common cause is that the path to RobloxPlayerBeta.exe has changed. Roblox updates frequently and sometimes reorganizes its files. Return to C:\Users\[YourUsername]\AppData\Local\Roblox\Versions and check whether a new folder has appeared. If so, copy the path from the newest version folder and update your batch file.

If both windows freeze or lag heavily, your PC doesn't have enough resources. Close the second window and check your Task Manager (press Ctrl+Shift+Esc) to see how much RAM and CPU are in use. If either is above 90%, you'll need to close other programs or upgrade your hardware. If one window crashes while the other stays open, this is normal — Roblox instances are independent, so one can fail without affecting the other.

Alternative: Using command prompt directly

If you prefer not to create a batch file, you can launch the second instance through Command Prompt. Press Windows+R, type cmd, and press Enter. In the Command Prompt window, type the full path to RobloxPlayerBeta.exe followed by -app, then press Enter. This does the same thing as the batch file but requires you to type the command each time you want to launch a second instance.

This method is slower than using a batch file shortcut, but it's useful if you only occasionally need two windows. You can also save the command as a text file and paste it into Command Prompt each time, which is faster than typing it out.

Frequently Asked Questions

Will Roblox ban me for running two instances?

No. Running multiple instances is not against Roblox's terms of service. The company doesn't prevent it because it's technically possible; they straightforward make it inconvenient by blocking the standard launcher from opening twice. Using the executable directly is a normal workaround that many players use.

Can I play the same game on two accounts at the same time?

Yes. Each instance logs in independently, so you can use different accounts in each window or the same account if the game allows multiple logins. Some games may have restrictions on simultaneous logins from the same account, but that's a game-specific rule, not a Roblox limitation.

What if I don't see the RobloxPlayerBeta.exe file?

Make sure you've enabled hidden files in File Explorer (View tab, check "Hidden items"). If the file still doesn't appear, Roblox may not be installed in the default location. Try searching your entire C: drive for "RobloxPlayerBeta.exe" using File Explorer's search function, or reinstall Roblox to may support it's in the standard folder.

Does running two instances use twice as much internet?

Roughly, yes. Two active games send and receive data simultaneously, so your total bandwidth usage roughly doubles. This matters most if you have a slow connection or a data cap. If you notice lag in both windows, try closing one to confirm whether bandwidth is the issue.

Can I do this on Mac?

Mac support is limited. The batch file method is Windows-only. Some Mac users report success launching Roblox through Terminal with similar commands, but the process is less reliable and requires more technical knowledge. Your best option on Mac is to use a virtual machine running Windows, though this adds significant system overhead.