I downloaded LocoRoco and it's 188MB, anyone else found something smaller? ... So what are the smallest size PSP Demos on PSN that we can download? Close. 5. Posted by. u/kurosiro ... Must have a Windows PC. * Must have VitaShell .... Go to the PlayStation Network site and sign in with your PlayStation Network login and password. Click "PS3 Demos" and select a game demo .... You can use a PS3™ s..