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Rad Mobile is an arcade Sega racing game from 1991. It was the first appearance of Sonic the Hedgehog... as a windshield ornament! The cars were sprites. Later they released the game retitled Gale Racer for the Sega Saturn with polygon cars.
I recently played the game and found it really challenge to rank high. The game has 20 levels starting in Los Angeles and ending in New York.
I remember seeing this in an amusement park arcade!
I was a giant Nintendo fan and my sister was a Sega fan. She was like "oh, wow, look, Sonic!" and I was like "why did they hang him?" ...and that was last time this game was discussed in the household.