wandering adventurer i believe, gives the option to travel the world fairly easily if need be, as for settings i was thinking a coalition war-like wastelands, with parts of the world still thriving and unaffected by the war, such as per say china, japan, atlantis, perhaps somewhere off to the edge of north america(free quebec or canada perhaps) and small highly profiting regions around the world, giving easy resupplys and great high yeild areas, however at great expense, so like little power pockets, as one travels the warring regions. in that regard its kinda like chaos earth for the fast majority of the world, with small profiting pockets, yet with many poor areas for much underground and black market trade in certain regions(china would not be ALL of china profiting, just certain provinces). In this regard it may very well be like mercs for hire, as when one travels to a new country they may need a source of income etc(perhaps). As for one setting, i dont think i will stick too one country as that limits the technologies and campaigns too much, but more as travel to different countries as need for different supply or weaponry increase. the reason for your adventure is up too the characters backgrounds, one may be seeking profits or power, as another may have come from the slums, thus perhaps causing conflict as the campaigns arise(up to the players, and determined by the characters alignment and back story, and what follows from good role playing of that char. e.g. a prideful power hungry selfish, motivated by power, character may cause a rift between the character as he gains that power and starts acheving his goals... however this is in the nature of role playing a character, so ill leave this up to how the playersprogresses). as for robotech is concerned, unless we are playing for a VERY long time and get a spaceship and travel to other alien planets, i dont belive robotech will come in, exept for certain weapons/mechs for any robot characters in the game(perhaps alien civilizations on earth have some robotechish weaponry?. also, you may start off with a robotech mech if youd like, however make a story on how some country developed it as an independent machine for that particular country, unless alien bla bla)