I kind of always wanted an RPG of severely under-powered normal folks in over their heads who survive through luck, absurdity, and definitely not knowing what they're doing or actually having the tools or knowledge to succeed. As in so inept that they aren't even trying to save the day, it ends up being kind of an accident.

Earthbound sort of had this type of feel initially, but then quickly loses it. Another aspect of Earthbound I like is it being set in the modern world. Controlling a bunch of weird slackers in a shitty van barely escaping inexplicable lovecraftian horrors a la some sort of video game Scooby Doo sounds like fun. You can do things like drink beers to take the edge off, but you have to try not to get too drunk or you might not be able to drive the van to escape.