Find your Rocket League map folder, usually located here: Documents\My Games\RocketLeague\TAGame\CookedPCConsole\mods
Have you ever wanted to play custom Rocket League workshop maps but felt lost with the file management? The most effective way to play custom maps on PC is by utilizing the map as a base.
Move your renamed custom map into the mods folder. Labs_Underpass_P.upk
Create a backup of the original Labs_Underpass_P.upk to avoid losing the default map.
When using Park_P instead of Underpass, forgetting to rename the file back can cause you to get a 15-min ban if you join a competitive playlist and Beckwith Park appears. Using Underpass reduces this risk. Find your Rocket League map folder, usually located
You don’t need to swap files between playing online and playing offline.
Take the custom .upk file you downloaded and rename it exactly: Labs_Underpass_P.upk . Create a backup of the original Labs_Underpass_P
For easier management, consider using the Rocket League Map Manager on GitHub to switch between custom maps automatically.