"Another big update for PGRC has just arrived. We have been working on adding mod support to the game, and today the first part is now available: Custom track mods are now live, using Steam Workshop!

Players can now create their own custom tracks (using external mod tools), and share them with other players using Steam Workshop. Some early testers have already made some amazing tracks.

This is just the beginning for mod support, more features for custom tracks, including support for leaderboards and playing custom tracks in multiplayer is planned, along with the ability to add custom cars into the game as well.

If you are interested in making your own tracks for the game, you can learn more on the Walaber discord or directly at the Modding Documentation page."