Shin Megami Tensei: Devil Survivor (Overclocked or original) ...the 'demo' part makes me think it's Overclocked.
Absolutely amazing series, one of my favorites out of any series there is.
I am honestly about to pass out though so I'll either go tomorrow or if someone wants to go by that time, I'll pass off my turn to whomsoever gets here first with the will of fire. If you haven't inherited the will of fire though, fuck off.