Kuuga
Successfully complete the game.
Agito
Successfully complete the game two times.
Kamen Rider 1 alternate
Unlock Agito, then successfully complete the game again.
Highlight Kamen Rider 1 at the character selection screen and
hold [L1] + [R1] for an alternate costume.
Kamen Rider 2 alternate
Unlock Kamen Rider 1 alternate, then successfully complete
the game again. Highlight Kamen Rider 2 at the character selection
screen and hold [L1] + [R1] for an alternate costume.