Self-explanatory title, im in the process of writing and planning an entire new Aurora scenario, it is based on the premise that the Earth was rendered uninhabitable by a cataclysmic event and the only human colonies active at the time, on Mars and Luna were driven back to middle-ages levels of life standards and technologies, just barely avoiding extinction, and my game will be set hundreds of years after that (the colonists lost track of time).
My question is, how do i make the Earth absolutely uninhabitable and devoid of life (the cataclysm itself resulting in a heavily irradiated planet, but it is unkown if it was result of natural processes or of anthropic origins, like a nuclear war) and if it is possible to change things such as tidally locking planets or drying up the oceans.
Thanks.
