I have no experience playing the Era game, but Era - The Consortium piqued my interest and this game is compatable with that while offering up your doomsday scenario to RP through. It seems a bit bleakof a world for my tastes, but in general post-apocalyptic is a type of game I'd like to get into.
Either way, I figured I'd plug the Kickstarter here because the game is already funded so this is basically just boosting signal and spreading word of mouth. Take a look, if it seems up your alley then maybe throw them a few bucks and get in on early on what looks to be a well made RPG. If not? Well, heck, not every game is for every gamer, right?
You can find the kickstarter link here.