[url]http://www.repo-opera.com/[/url]
Awesome movie, if quite unknown to most ppl. Certainly a cult movie by any measure. I think it would make a good game. You'd have a certain number of accounts to collect every night, have to stalk your prey and kill them in a way that wouldn't damage their organs, then remove them in a Trama-esque mini-game where any damage to the organ would incur a financial penalty.
You'd have to be careful, even people 90 days behind on their payments might have friends willing to help save them from the repo man.