so i had an idea for a game the players would be people eeking out an existing on mars after an alien craft terraformed the planet in the mid 2020's. by the 2050 humanity had spread to the moon of the gas giants, the asteroid belt, mars(of course) and venus. Mars is technically habitable but is harsh and machinery and finished goods have come to a halt because earth has entered the third world war. anyway the players would be a group of Prospectors/Mercanaries who would go around the world finding veins of ore, water, crashed ships, and other thing for a mercenary company. now im trying to figure out what system on role 20 would best work for this