Next time you get into the game, it will start in fullscreen.Set up Resolution to Fullscreen and click Apply.Here are three things you can change: Resolution, Display Mode, Vertical Sync On the top left, you will notice Window Settings.Alternatively, you can access Options through Practice mode.There will be Options tab to the left.You can also access the game settings within Rocket League and change your resolution and window size there. Making Rocket League 2 fullscreen in the game itself This is a simple method that works for all the Steam games. The next time you open the game, Rocket League will start in fullscreen.Here, you should type –fullscreen in the box.There should be Rocket League to your left click on it.Here is a step-by-step guide that will allow you to turn Rocket League fullscreen in Steam: Making Rocket League fullscreen through SteamĪlthough you can no longer get Rocket League on Steam, you can still play it if you haven’t removed it from the library. In this article, we will review how to make Rocket League fullscreen and resolve this issue. In rare cases, this might even prevent you from going back into the game. Occasionally, the game might glitch out and turn into windowed mode.