A very plain map, but very useful! This is really more of just a main hub to get to almost any of the maps in the game, IN FREEPLAY. Go through the portals and you’ll, be loaded into the corresponding map. From there feel free to do anything you would normally do in freeplay! Be advised tho, some of the maps that are a different size than the normal freeplay map might spawn you in wierd spots (in walls or out of map). Just 

ps. it also works with the Rocket League Trainer for the most part 😀 (the different sized ones can be a bit finicky)