It seems almost every PSP game franchise wants to take a page from Monster Hunter Portable (for obvious reasons). Project Ace's upcoming Ace Combat: Joint Assault unsurprisingly adds four player co-op -- but with its aerial combat, it should prove a refreshing change from hunting monsters, eating gods, and peace walking.
While the graphics of Joint Assault have taken an obvious hit from its transition down to PSP, we're impressed by the locales shown by the trailer. It seems dogfights will blaze through the skies of Tokyo, San Francisco, London and Egypt. Hopefully, we'll see more of the game before it releases later this year.