I am looking to start writing a campaign for some friends, but am not sure what system to use for this. I am trying to be as specific as possible with my requirements, so as not to end up asking a list question, so if I have excluded everything, please feel free to offer systems that miss as narrowly as possible :)
My group are old rpg-ers, and a mix between number-cruncher types and story-teller types, so the system needs to be fairly complex, without bogging us all down in the numbers every two minutes.
System: I would like a fairly detailed system, with equal playability and interest across several modes of play/classes etc. I would also like to see some kind of non-combat character development as well as the standard combat improvements.
Setting: while I know I can create the setting in any system, I'd like to find a system that already has the details of the world ready-made - I would rather not sit with the Hero system for hours to work out the stats for a laser-turret, for example. The setting I'm looking for is best described in short as Shadowrun, but post-collapse. There will be artifacts of a Shadowrun-like world, but the players don't have access to any of that level of tech, they are more "mad-max" in tech level. A little like Fallout, without as much left-over tech.
The aim of the campaign is to provide a tech-rich (and hence dangerous) environment for the PC's to forage to make a living without being equipped for hi-tech solutions (as they would be in vanilla Shadowrun, for example)
The challenge for me so far has been the disparate tech levels between the world and the characters, I feel like I'm making DnD characters to play Shadowrun (and in a way, I am), but need a system that will cover both together. (And in fact, mixing two settings in D20 might be my best solution here, as long as the power balance isn't too far off)
Although all the settings/systems I've mentioned have it, I didn't intend for magic to be a part of this world. I may play with some psi or techno magic if a ready-made system has it, but don't require any.
So, does this beast exist? Or have I doomed myself to mixing and/or making my own?