F355 Challenge Sega Dreamcast cheats

Full pause screen
Pause the game and press X + Y.

Unlock courses
At the options screen, press X + Y, then choose the "Passwords" selection. Enter one of the following case-sensitive passwords to unlock an additional course:
CinqueValvole
LiebeFrauMilch
Stars&Stripes
KualaLumpur
DaysofThunder