There are several courses you can unlock in Ridge Racer 3D for the Nintendo 3DS. Here are the courses you can unlock, and how to unlock them.
Advanced Grand Prix – Finish Beginner Grand Prix Event 18
Expert Grand Prix – Finish Advanced Grand Prix Event 36
Mirrored Courses – Finish Expert Grand Prix Event 48
Mirrored Reverse Courses – Finish Expert Grand Prix Event 48
