Labs_underpass_p.upk May 2026

It is considered one of the best methods to load custom maps on PC. How to Set Up Custom Maps (Step-by-Step)

This blog post guide helps Rocket League players navigate the complexities of using custom maps via the Labs_Underpass_P.upk method. Labs_Underpass_P.upk

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. It is considered one of the best methods

Labs_Underpass_P.upk is the underlying file for the "Underpass" Rocket League map. By replacing this specific file with a custom map file and naming it properly, you trick the game into loading your custom map instead of the standard Underpass, allowing you to play workshop maps in Freeplay. Why Use the Underpass Method? Using Underpass reduces this risk

Move your renamed custom map into the mods folder.

Open the game, select "Freeplay" (or local match) and choose "Underpass". Your custom map will now load. Pro Tips for Map Modding

Find your Rocket League map folder, usually located here: Documents\My Games\RocketLeague\TAGame\CookedPCConsole\mods