Setting
It's no secret that SpaceCorp only just lost the rights to their own Martian biosphere, a terraformed settlement that has managed to self sustain itself. They were bought out by Marstech, who aim to use their patents to replicate SpaceCorp's success elsewhere. Way to kick a dog while its down, Marstech.
Think of as Antarctica on a much larger scale. All sorts have different stakes on Mars and different ideas of what a settlement looks like. And while you could, do you really want to live there?