Secret game:
Press Start on controller two when the title sequence begins. A simple game similar to the light cycle portion of Tron will begin.

Quick race:
Enable the pace lap option and begin a race. Get into the first place position before the pace car enters the pits during the pace lap. Then, pause game play and select the "Leave Track" option to instantly win the race.

Race as Jeff Gordon or Dale Earnhardt:
Successfully complete season mode by winning every race.