NFS Most Wanted Hidden Arcade Mode

So i was deciding to play some Most Wanted on my XBOX 360. I loaded the disc and got ready.

When it loaded it showed me a logo called Ruinspace Interactive and Black Box, it appears Ruinspace bought Black Box before EA did. It showed me the intro, but instead of the intro, it was completely different, It showed a Ford GT, a Mazda RX8 and a Evo racing on a highway road. The Evo had a nitrous leak and crashed and the GT passed the RX8.

I was greeted to the menu that looked like Underground 2's menu. Then i clicked continue and then i caught a glimpse of the cars, cars that were not in the game. I went to my cars and found a new button, Auto-Customize. "WHAT THE?" I shouted. I pressed the button, and then.... BOOM! It was customized automatically. I was so surprised, this did not appear in the final game. It was almost like Hot Import Nights and Underground 2 had a baby. I chose free-roam and then i was greeted to a Singapore-like city called Newmark City. I did not knew this was even Most Wanted. Was this some modification? Was this a DLC? No One Knows.