Complete Stage 1.
Complete Stage 2.
Complete Stage 3.
Complete Stage 4.
Complete Stage 5.
Finish the game with Sonic Blast Man (Normal or Hard, don't switch characters).
Finish the game with Sonia (Normal or Hard, don't switch characters).
Finish the game with Captain Choyear (Normal or Hard, don't switch characters).
Finish the game on hard without use continue.
Reach 500,000 points.