M.U.L.E. was great fun! For some reason this also reminded me of another game (not a 4-person one) that also had at the beginning some sort of trading/barterin

M.U.L.E. was great fun! For some reason this also reminded me of another game (not a 4-person one) that also had at the beginning some sort of trading/bartering component, but then you were outside in some sort of vehicle (airship?) searching for components. I can't remember the title or enough details to track it down though. (I remember riding up and down in a lift in the beginning though.)