Well i have a few options that i am willing to run.
I wont go into specifics about rules or anything like that just the Scenarios and Systems.

* Fallout
Based of the Computer games of the same name. Useing the SPECIAL system used in game with modifications to make it more table top oriented.

Fallout technology wise and story wise is loosly based on the future if it were designed and built like it was in the 50's. Old post and pre war holo films were used as propoganda, Vintage 50's cars were never stopped just the technology under the hood upgraded.

Set after fallout 2 in California, Nevada and Oregon you start as a bunch of no body's detirmined to make a name for yourselves in the dieing world. As a group of individuals you know that a lone person cannot survive this world, but as a bunch of individuals who have nothing to loose you can join up to gain power in the world.

*Warhammer 40k
A choice of...
Inquisition: You play as the retinue of an inquisitor in the warhammer 40k universe.
Rogue Traders: The imperium has given you a letter of writ that allows you to trade amoungst the stars. Profit, alien technology, Profit, Piracy, and Profit just dont let the inquisition know what your doing.
Deathwatch: You are amoung a chosen few of the imperials Finest. The Genetically altered Space Marine. Specialists amoungst various chapters are pulled from the ranks and put into a special death watch group who are an elite group of the space marines assigned specific tasks by the imperium.

*Battle Tech
The clans invaded long ago and were stopped Tukayyid in May of 3052 by the Com Guards the ancient defenders of earth. The federated common wealth has splintered, The clans have been put on the back foot and several of them have been destroyed.

It is a time of employment as a mercenary squad. Starting of with low funds and minimal technology and mechs you seek out jobs for Hire. Proving is part of being a mercenary and you have to start taking the crap jobs to earn your name, Either by being attached to larger merc forces or house forces or as an individual unit on some backwater planet doing guard duty against pirates.