Frogger 3D Challenge mode
Successfully complete the game with all levels 100% completed by not skipping over any levels when the storyline branches. The question marks at the main menu will then turn into the “Challenge” option.
Worlds 7 through 12
Successfully complete the game to unlock Worlds 7 through 12, which are harder versions of Worlds 1 through 6.
Extra mode in Forever Crossing mini-game
Successfully complete World 12 to unlock Extra mode in the Forever Crossing mini-game.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art / Original