The habitable planet located in solar system. Compared to planet Earth in real life, this Earth has higher density, thus creating the following differences:

1. Stronger gravity.
2. Higher air pressure, thus higher buoyancy.
3. Denser mineral deposits.
4. Fewer underground water.
5. No or very few oil and gas deposits.

This world shares similar human history until the industrial revolution, where the limited resources changed the direction of technical developments.

There are two major factions on Earth:

Union, located on a centralized location near the equator;

Exile, scatter around the rest of the wasteland world.