Play Rocket League on two monitors with 2 Players

1. Go to My Documents > My Games > RocketLeague > TAGame > Config and find the file called TASystemSettings.ini. 2. Find a row with "ResX" and set it to 3840 (2 x 1080p), and "ResY" to 1080 (Naturally you have to change the values if you have a different resolution monitors). 3. Press CTRL + F and search for "borderless", when you find it, set it to "True". Then search for "fullscreen", and change all three instances to "False". Save and close the file. 4. After that, when you launch the game, it should fill both monitors. Finally make sure that in options you have vertical splitscreen enabled.