Rocket League Credits aided test early forms of Rocket League from xingwang's blog

were simply offered out to players who Rocket League Credits aided test early forms of Rocket League. The four things recorded as early rewards are a Gold Cap (Topper), Gold Rush (Boost), Goldstone (Wheels), and a Gold Nugget (Antenna). 

The Gold Cap, Gold Rush, and Goldstone things were offered.

 out to players who took an interest in the Rocket League Alpha eventually between Feb. 23 and Aug. 10 out of 2014, while the Gold Nugget was a subsequent compensation for beta analyzers www.lolga.com  between the finish of the Alpha and the game's true dispatch on July 7, 2015.