Dissidia Final Fantasy Opera Omnia

Final Fantasy is a long-running game franchise by Square Enix. Dissidia games like that on the PSP is one of their titles. These games would have most of the protagonist and antagonist throughout the whole series in it. It's a royal rumble.

Here's a cutscene video of the story behind the world in Opera Omnia:

I've also recorded the screen where all the available heroes with some background are presented. I've scrolled through them all, just pause in case you need to read.

The next 2 videos below are recordings of battle scenes. It basically explains how you play the game once you enter a spot in the map for your missions.