Labs_underpass_p.upk < RECENT ✦ >

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

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

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

Take the custom .upk file you downloaded and rename it exactly: Labs_Underpass_P.upk .

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

Ensure the map you are using is up to date and correctly renamed.