[quote name='Raye']Tempting, but I don't even have a Vita and am not sure if I want one with this being the only game I'd buy it for.[/QUOTE]
P4G and Zero Escape were the sole reasons I pulled the trigger and bought a Vita - Amazon happened to be bundling it with Zero Escape: VLR, sequel to 999, for free at the time. Played that, then amassed such a backlog through PS+ freebies and a few discounted titles that I still haven't bought P4G and have at least a couple of months of solid gameplay ahead anyway.
I didn't think there was much else for Vita at the time, but the more I looked the more I found. Really impressed with the system in spite of my expectations when I picked it up.