Every Extend Extra Boss Attack mode
Successfully complete Arcade mode to unlock Boss Attack mode.
Caravan mode
Successfully complete Arcade mode to unlock Caravan mode, which allows specific stages to be played.
Stage Alpha
Earn a “C” or lower rank in all Arcade mode stages to unlock Stage Alpha.
Stage Omega
Earn an “A” or higher rank in all Arcade mode stages to unlock Stage Omega.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art / Original