Hold Up while selecting a fighter at the arcade mode character selection screen.
Cloud's third costume
Successfully complete the game as Yuffie. Highlight Cloud at the character selection screen, then hold Down and press X.
Defeat the Final Boss (Arcade Mode)
When fighting the final Boss, break open the two boxes on the altars. Throw both of the swords that come out of them at the Boss to destroy him. Collect all the treasures and Ehrgeiz when they appear. Note: This is timed and if you are injured too much, you will lose.
Fight as Clair Andrews
Successfully complete arcade mode using any female character.
Fight as Django
Successfully complete arcade mode using the eight regular non-Final Fantasy 7 characters.
Fight as Kouji Masuda
Successfully complete arcade mode using any male character.
Fight as Vincent as a Turk
Highlight Vincent at the character selection screen. Hold Up to see him as a Turk. Highlight Vincent and rotate the D-pad in a Full-circle.
Fight as Vincent Valentine
Successfully complete arcade mode as Tifa.
Fight as Yuffie Kisaragi
Successfully complete arcade mode as Cloud.
Fight as Zack
Successfully complete arcade mode using all Final Fantasy 7 characters.
Hidden Introduction Sequence
Start loading the game and do not press any buttons on the controller. Allow the introduction sequence to play four times uninterrupted. Then, enter the "Movie Player" screen. Highlight the "Opening Movie" selection and press Right to access the new "Extra Opening" selection.
Infinite Mode
Press L1 + Start at the "Press Start" screen.
Normal Ehrgeiz Characters
Complete the following tasks to unlock the costumes in this order: Yoko, Han, Doza, Inoba, Sasuke, Jo, Lee, Godhand.
Tifa's third costume
Successfully complete the game as Vincent. Then, hold Down while selecting Tifa at the character selection screen.