Spy Hunter Arcade mode
Enter ” EDACRA ” as a name to unlock arcade mode.
Delete saved games
At the copyright screen, press Left(2), Right, Left, R(2).
Delete high scores
At the copyright screen, press Up(2), Down, L, R, L.
Super Agent mode
Successfully complete the game with all Primary Objectives and Secondary Objectives to unlock Super Agent mode.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art.