The game comes with an expectation of a desertic/post-apolyptic setting ala Mad Max. The group of players are a group of survivors, nomads, and they all share one vehicle. I don't intend the characters themselves to have a ton of advancement, but that the progression be more on their vehicle, their stockpile of resources, etc.
I'm looking into a salvaging/crafting system, some vehicle combat (which includes actors moving around the vehicle, shooting, boarding) and some exploration rules as you're crossing a desert, I'm considering expectations of a hexcrawl or pointcrawl, but that's not clear yet.
I'm also very interested in having some rules for lackeys/sidekicks.
I'm not too interested on very binary resolution. "I try to jump on their vehicle." Roll. "You fail, you fall down and are left behind" is not what I'm going for. I want to have some clear procedures for all these parts of these encounters, or the exploration, or the crafting. But I'm more interested in how the player succeeds, or what complications his success brings.
I'm intending to have a a decent amount of granularity not in the characters themselves, but the different parts you can craft for the vehicle. Do you install additional nets under your wings to stock goods? Or do you install a fuel container? Resource management is one of my goals.