Although the mod is "sort of" set in Australia,/QUOTE]
BTW, not to bring dreary old reality into it, but I remember reading (in
Collapse: How Societies Choose to Fail or Succeed by Jarid Diamond) that due to lack of volcanoes and the like in Australia, the topsoil was originally very thin. After very little time of agriculture by the European immigrants, this top soil was lost and today Australia is the largest importer of nitrates and other fertilizers.
Obviously after The End(tm), this wouldn't be possible so the really nasty, desert Australia shown in the movie
Tank Girl probably isn't that far off the mark. Since it seems better that every Fury Road map be a set map, it would seem that a Australian game would have to have different terrain with tundra colored to look like plains but acting like tundra and grasslands would be very rare and thus plains would be the the best you could hope for except for flood plains. This would really put pressure on building up technologies that would result in fertilizer but till then, population would be hard pressed to generate enough food to really grow.
Again, obviously, this would be radically different then a scenario based in the Pacific Northwest where we have plenty of rain, plenty of ash from volcanoes, not to mention plenty of rivers for hydro-power which really be the crucial in getting technology going again. Playing a Australian scenario would really, really be hard if you wanted to be very realistic.
Perhaps a Australian scenario might have a 'Fremen' route and have condensation traps (a building that would add health and/or food) to help get more water and other arid/desert technology like qanats/kareezes that could be built and provide a food bonus to farms next to it.
Also, here is a link for info on a steam tank:
http://en.wikipedia.org/wiki/Steam_tank - Looks like if you had the steel, this wouldn't be that hard to make. My only question, I have no idea who to ask, would be how small can you make a powerful steam engine? Those WW I tanks were huge and I sort of doubt the same engine would fit in a WW II type tank.