Stephen Hawking Stresses the need to Evacuate

[Alby_da_Wolf]

COKTOE said:

NightDragon83 said:
What if we colonized Mars, and then the first Mars colonists revolted against the Earthlings? We could have our first interplanetary war!

Roughly the plot of the Killzone series.

Also the much older Mechwarrior 2: Mercenaries. While the opposite, Earth attacking the colonies would be like the even older Terra Nova: Strike Force Centauri.