Planets
The UAC’s solar-system board — Mercury Rising’s Plot made browsable. Pick a world.
Official DOOM stories have mostly shown Earth and Mars. Mercury Rising patches the map: the same corporation is already busy across the system by 2141, and Hell sits as a gateway between those points.
Headquarters — in theory
Earth
Home of the UAC headquarters and High Council — the board that moves pieces across the solar chessboard. Mercury Rising treats that authority carefully: nothing is quite as it seems when profit, law, and morals collide off-world.