The Apartheid Manchild has this weird obsession with Mars.
There will be no permanent settlement on Mars in the next decade. (I frankly doubt that there will even have been human footprints on Mars in the next decade!) There will be no permanent settlement on Mars in the next century. There will likely be no permanent settlement on Mars in the next millennium. And I'm saying that last one not because I don't think we'd have the technology in a thousand years, but rather because there is no point in living on Mars.
Mars has nothing we need that's worth maintaining a settlement in the face of conditions harsher than the absolute worst the Earth has to offer. If people want to live in a permanently cold shithole with nothing usefully accessible they can just build a house on Antarctica. It's a far cheaper way to fuck around and find otu.
Way back in prehistory I played Car Wars when it first came out. (You know, before it became an unwieldy, badly-organized mess that rivalled even Star Fleet Battles for being impossible for normal folk to play.)
We missed one very key rule. The "damage" rating for weapons was a number of d6 to roll for damage. We played it as individual points.
Needless to say even the shortest auto duels were horrifically and painfully long to play out.