Metal Slug 4 Alternate ending sequence
Once you defeat the final Boss, you will go to another room where you must run from explosions. Instead of getting away, let yourself get killed by the explosions and the ending sequence will be different.
Art gallery
Successfully complete the game to unlock the art for that character in the gallery.
The image featured at the top of this post is ©The Legend of Heroes: Trails of Cold Steel III key art / Original