Bonus Accessories
After beating the game, start a new game on the save clear file and you'll find your costumes and accessories are brought over from your previous game. Two new accessories will be added to your accessories list as well, the Spike Batch and Spike Sign.
Sound Mode
Beat the game and save your clear data, than go to the main menu and click on extras. Sound Mode will now be available.

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?