IC: Guardians & Gangsters
When the crooks work in broad daylight and the only cops who don't hide are the ones on the take, who will you turn to?
I'm considering running a game using the GangBusters! B/X system with the optional Mysterious Powers rules, where you can play street-level masked heroes during the Roaring 20's/30's and clean up the streets with your fists, bullets, and the occasional mental blast.
Unlike the MARVEL NOIRVERSE game I ran before, I'd expect people to create their own identities and masks and not obviously copy well-known heroes.