Getting the Internet Ranking (IR) screen requires passing at least 3 stages in a course. After the screen is obtained for a certain course, that course will not count again for unlocking purposes

Unlockable How to Unlock
7 Stars Get the IR screen twice
Bonus Get the IR screen 9 times
dj TAKA Get the IR screen 7 times
Euro Get the IR screen 3 times
Flower Get the IR screen 4 times
Hyper Get the IR screen 6 times
L.E.D. Get the IR screen 10 times
Millenium Get the IR screen 8 times
Techno Get the IR screen once
Turbo Get the IR screen 5 times
Song Unlocks

Unlockable How to Unlock
ErAseRmoToR maXimUM Clear Arcade Mode seven times
Gobble Clear Arcade Mode three times
Infinite Prayer -floating flock style- Clear Arcade Mode five times
Sana Mollete Ne Ente -B.L.T. Style- Clear Arcade Mode twice
The Big Voyager -Infinite Prayer Reinterpretation- Clear Arcade Mode six times
The Shining Polaris Clear Arcade Mode once
Trancemission Clear Arcade Mode four times
Unlockable Modes

Unlockable How to Unlock
Original Course Setting Play all 53 songs at least once. Passing not required
Survival Earn a grade of A or better on an Original Expert Course