Psyonix has talked about the Supersonic Acrobatic Rocket-Powered Battle-Cars easter egg for a while now, and has now finally been discovered. Credit goes to Jimmy_B on Twitter for finding this easter egg.

After following unclear instructions for a while, I finally got it to work.

The following video will show you how to unlock this easter egg.

You need to type in the Konami code (up, up, down, down, left, right, left, right, O, X) during Rocket League startup. When the start screen shows up, you have to press the Options button. The SARPBC logo will be displayed instead of the Rocket League logo. The SARPBC theme song will start playing, and a SARPBC original map (Wasteland) will be loaded.

The easter egg has been unlocked successfully on the PC version using a DualShock 4 controller. We tried it on a PlayStation 4, but with no luck.

Message us here if you find any other Rocket League easter eggs.

EDIT: On PlayStation 4, use this code instead: (up, up, down, down, left, right, left, right, X, O), then press 'Options' once the game tells you to press any button to start.