The New Adventures Of Menion Infinite health
At the title screen when the words appear together with a crash, quickly press L1, R1, R2, L2. Note: Your character can still be killed by falling off ledges.
Infinite GHK-79 ammunition
At the title screen when the words appear together with a crash, quickly press X, Square, Circle, Triangle.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art / Original