The "deep story" is told through your progression and the physical toll of the environment:
: Your story starts in the mud. You manually shovel dirt into a small mobile wash plant. Every ounce of gold you find is a hard-won victory that keeps the lights on and the fuel tanks full.
The text you provided, , appears to be a specific file name for a digital release of Gold Rush: The Game , likely a bundled version including all downloadable content (DLC).
: As you strike paydirt, the scale shifts. The story evolves from a personal struggle to a management simulation. You begin hiring workers, leasing multiple claims, and operating heavy machinery that can move tons of earth per hour.