Lookin' Sharp:
At the Title screen where you see 'press start' flashing on the screen, hold down L1, L2, R1, R2 at the same time and wait until you hear three dings of a bell. Now hit Start, and when you go to select your fighter some of them have on different clothes.
Thanks to Revolution reader Maxwell SilverHammer!

Embark on an inspiring mission of human connection beyond the UCA. Sam — with companions by his side — sets out on a new journey to save humanity from extinction. Join them as they traverse a world beset by otherworldly enemies, obstacles and a haunting question: should we have connected?