RocketLeagueLauncher

This is a Python script which will launch the Epic Games version of Rocket League.

Benefits of using this are:

• Launch Rocket League via Steam to have all of the benefits of the Steam overlay, recording, FPS counter etc.
• You no longer need to run the Epic Games Launcher at all
• You can have multiple accounts configured and easily launch them without having to sign out and back in to a different account via Epic Games

Requirements

• Python 3.7+
• Epic Games version of Rocket League
• Steam

To use it, you'll need a valid authorization code. Full instructions on how to configure this script are as follows:

Configure the script (Method 1 - v0.0.3+)

1. Run the script using Python and provide it with your Rocket League path (e.g. py rocketleague_launcher.py -p "C:\Epic Games\rocketleague\Binaries\Win64\RocketLeague.exe")
2. The script should open a browser window for you to login to your Epic Games account and then ask for you to provide the authorization code which you will be redirected to in your browser after logging in - so do this and then paste the authorizationCode value into the box (e.g. 33c56a17870a110ea5955c133f5e64c2)
3. Once you've input the correct authorization code, Rocket League should run and be logged into your account - if not then you did not provide the correct authorization code value so please try steps 1-2 again or try method 2 below

Configure the script (Method 2 - v0.0.1+)

1. Login to your Epic Games account at https://www.epicgames.com/id/login
2. Once logged in, go to https://www.epicgames.com/id/api/redirect?clientId=34a02cf8f4414e29b15921876da36f9a&responseType=code&prompt=login& and copy the authorizationCode value (e.g. 33c56a17870a110ea5955c133f5e64c2)

You must now do the following steps quickly because the authorizationCode is only valid for a couple of minutes max:

3. Edit the .epicenv file - paste the authorizationCode value into it and save it
4. Edit rocketleague_launcher.py and modify the rlpath variable to point to wherever your Rocket League executable is
5. Run the script so it gets an initial refresh code and you can test that it's working (py rocketleague_launcher.py) - this should run Rocket League and it should be signed into your account, if not then you did not configure something correctly in steps 1-4

Configure Steam

1. In your Steam Library click on Add a Game -> Add a Non-Steam Game...
2. Wait for it to finish loading and then click on Browse... and find your Rocket League executable
3. Once created, edit the game you just added by right clicking and choosing Properties...
4. Change the Target to your Python's pythonw.exe path with rocketleague_launcher.py as the argument and if you're using RocketLeagueLauncher v0.0.3 or above then also provide your Rocket League path (e.g. "C:\Python312\pythonw.exe" rocketleague_launcher.py -p "C:\Epic Games\rocketleague\Binaries\Win64\RocketLeague.exe") - NOTE: Using pythonw.exe means Python will launch with no visible windows, which is what you want since Steam will assume the window is the game and try to inject the overlay into it
5. Change the Start In value to wherever you saved rocketleague_launcher.py (e.g. C:\Users\yourname\Documents\RocketLeagueLauncher\)

Now you're done and can begin launching Rocket League via Steam!

How to use multiple accounts (Method 1 - v0.0.3+)

1. Run the script but provide it with a new environment file name (e.g. py rocketleague_launcher.py -f .epicenv_alt_1)
2. When the script opens your browser window, go to the Epic Games homepage and logout of your account, then login again with your alt account
3. In the same browser, go to https://www.epicgames.com/id/api/redirect?clientId=34a02cf8f4414e29b15921876da36f9a&responseType=code&prompt=login& and copy the authorizationCode value (e.g. 33c56a17870a110ea5955c133f5e64c2) and then paste it into the script's text box which should have previously popped up
4. Close the game when it opens
5. Follow steps 1-5 of Configure Steam but change the Target to include the new environment path (e.g. "C:\Python312\pythonw.exe" rocketleague_launcher.py -f .epicenv_alt_1 -p "C:\Epic Games\rocketleague\Binaries\Win64\RocketLeague.exe")
6. Repeat these steps 1-5 for any additional accounts you wish to use

How to use multiple accounts (Method 2 - v0.0.1+)

1. Copy rocketleague_launcher.py to something like rocketleague_launcher_alt.py
2. Modify the new copy of the script and change the envfile variable value to something like .epicenv_alt_1
3. Follow steps 1-5 of Configure the script (Method 2) but instead of modifying .epicenv in step (3) you will be modifying whatever name you specified above (e.g..epicenv_alt_1)
4. Follow steps 1-5 of Configure Steam but using rocketleague_launcher_alt.py (or whatever name you used when you copied the script)
5. Repeat these steps 1-4 for any additional accounts you wish to use, just make sure you copy the script to a new name and configure it with a new envfile path to use each time

Troubleshooting

Make sure you have installed Python 3.7 or above and that you can execute Python correctly via Windows command prompt by typing py -c print('test') or python -c print('test') and pressing enter. You should see the text test appear in the window if Python is correctly installed, otherwise you may see an error and will need to go and install Python from https://python.org..

If Python is installed and working, but the script is not working as expected, you should be seeing a pop up error message telling you what went wrong. Try deleting your .epicenv file (or whatever file you're using) and trying again from the start of Configure the script instructions.

If it works to begin with and then stops working, it's likely that your refresh code has expired. Refresh codes will last for 23 days, so if you don't launch the script for longer than that then it will expire. It's also possible for them to be invalidated by Epic Games. Just follow steps 1-3 of Configure the script and it will work again.

How does it work?

The script makes use of Epic's Epic Launcher credentials to make API requests to the Epic Games OAuth backend. We first need an Epic Games launcher authorization code which we can get via a browser. Once we have this code, we're allowed to perform API requests as the Epic Games Launcher so long as we're also using valid HTTP Basic Auth credentials associated with the Epic Games Launcher. We can then ask the API to give us an initial, generic OAuth refresh code which we'll then exchange for an eg1 access code and refresh code. This means we now have game launching permissions, but to launch a game we'll need to exchange this access code for a launcher code. Finally, once we have the launcher code we can start the game by providing it with this launcher code, and the game will verify this code with Epic Games to obtain all of your account details and authorize you into the game itself.