Labs_underpass_p.upk -

You don’t need to swap files between playing online and playing offline.

This guide will walk you through setting up, testing, and managing custom maps using the Labs_Underpass_P.upk file method. What is Labs_Underpass_P.upk? Labs_Underpass_P.upk

Disclaimer: Modding Rocket League is done at your own risk. Always backup your files. Map files & packages - RL Modding Wiki You don’t need to swap files between playing

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

This method is primarily for local play and Freeplay.

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