There is a way to show the credits without winning.
Do a Regular League Match and choose to fight manually. Lose deliberately. Repeat.
After many losses, you will get mail saying that the company is talking about dismissing you. Attached to that is a little 'Bad Ending'
Ending (You don't lose the game, you can still keep playing to reach the top) and after the ending, the credits will roll.
Boost Forward on the ground and press O Fire Energy Wave
D-Pad UP and Square Simultaneously Drop Right Arm Weapon
D-Pad UP and O Simultaneously Drop Left Arm Weapon
D-Pad UP and D-Pad Right Simultaneously Drop Extentions
For Armored Core: Formula Front International version only.
Unlockable How to Unlock
50 Exhibition Matches Beat Formula Regular League
Ending Credits (movie attachment) Beat all 50 Exhibition Matches