Way back in early 2011, I was working on vehicle customisation for Need for Speed The Run. EA had managed to obtain the rights for the Porsche 918 RSR Concept car which had been previewed earlier that year.
Each car in-game has 2-3 levels of visual progression with a choice of colours at each level. I approached Porsche AG about creating some retro 917 liveries for the 918RSR given their heritage. It took a while but they eventually agreed to the three above, Hippy, Porsche Salzburg and the Pink Pig.