Labs_underpass_p.upk Guide

Create a backup of the original Labs_Underpass_P.upk to avoid losing the default map.

Move your renamed custom map into the mods folder. Labs_Underpass_P.upk

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

Ultimate Guide to Custom Maps in Rocket League: Mastering Labs_Underpass_P.upk Ultimate Guide to Custom Maps in Rocket League:

Disclaimer: Modding Rocket League is done at your own risk. Always backup your files. Map files & packages - RL Modding Wiki

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?

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?