From the back of the box:
"Under A Steel Sky...
Life if the Weird West's never really easy, but some places are worse than others. If you're fond of things like clean water, fresh air, and wide-open spaces, then the City o' Gloom's just about the worst place around.
Sure, Salt Lake City's the only place in the West with electric lights and indoor plumbing, and it's the center of the most incredible scientific advances anywhere in the world, but progress always has its price.
The City o' Gloom boxed set comes packed with everything you need to know about this city on the cutting edge of the Weird West's tomorrow. It includes a 128-page sourcebook (which covers the history and current state of affairs of Salt Lake City, plus full rules for skullchucker(tm), the most popular bloodsport in the City o' Gloom), a 32-page digest on the mechanical augmentations of the human body performed by the outlawed Dr. Gash, another 32-page digest featuring new hexes for huckster mad scientists, three full-color cards (featuring a salt rattler, a landship and counters for use with the skullchucker game), plus a full-color poster map featuring Salt Lake City on one side and a skullchucker gameboard on the other!"