Hi-Fi Mode, Bonus Cars and Bonus Tracks To get all the bonus items in Arcade mode, which include the four other tracks (Autumn Ring, Deep Forest, SSR5, and Grand Valley Speedway), all the other cars (Toyota, Subaru, Dodge, and TVR), the ending movie, and Hi-res GT Mode, you have to beat every single track with each type of car (A, B, and C) under all three modes of difficulty (Easy, Normal, Difficult.)
Hidden Video of the GT Staff In Arcade Mode, first get the hidden tracks, then, on every track, take 1st place with any car in A,B, and C class mode on Normal setting or higher. Then go to Bonus Items, you'll see "Staff Video" on the menu.
Really Easy Money To get alot of money very easily, buy the Viper GTS. Don't make any adjustments to it. Then go to the commercial cars championship under the Special Events menu. Use the Viper. You'll easily blow away all the other competition. And just for winning one race you get $50,000 and for winning the championship you get $100,000. If you place first in every race, get the pole-positions, and win the championship you'll recieve $400,000 in total. That's alot of money!!!
Replay Mode Tip Are you having trouble beating the license tests? Well, you won't anymore. Go to the replay theater in the main screen, and check out the demonstration movies. They will show you how to beat all the license tests!
Win the Concept Car To get the Concept car, enter the American vs. British race and place first in the championship. The second way to get the Concept Car is by earning the gold prize on each of the 7 B-Lisence preliminary tests and on the final test.