The Republic of The Underworld of Terradin is a gargantuan, socially progressive nation, ruled by Leader with an iron fist, and notable for its multi-spousal wedding ceremonies, frequent executions, and irreverence towards religion. The hard-nosed, hard-working, cynical population of 23.238 billion Underworld of Terradinians are rabid consumers, partly through choice and partly because the government tells them to and dissenters tend to vanish from their homes at night.

The medium-sized, corrupt, pro-business, well-organized government prioritizes Defense, although Law & Order, Industry, and Public Transport are also considered important. It meets to discuss matters of state in the capital city of The Underworld of Terradin City. Citizens pay a flat income tax of 33.5%.

The powerhouse Underworld of Terradinian economy, worth a remarkable 1,822 trillion Gold Coins a year, is fairly diversified and led by the Arms Manufacturing industry, with major contributions from Gambling, Woodchip Exports, and Pizza Delivery. Black market activity is notable. Average income is 78,446 Gold Coins, but there is a significant disparity between incomes, with the richest 10% of citizens earning 224,757 per year while the poor average 21,790, a ratio of 10.3 to 1.

Every citizen must submit to DNA testing to be eliminated from police inquiries, citizens are regularly found digging for treasure in their gardens, the children of The Underworld of Terradin are often remarked upon for their cheery attitude to extreme violence, and The Underworld of Terradin-made cars tend to catch fire in people's driveways. Crime is a problem. The Underworld of Terradin's national animal is the Mole, which can occasionally be seen sifting through garbage in the nation's cities.

The Underworld of Terradin is ranked 58,696^th in the world and 15^th in Mystria for Most Subsidized Industry, scoring 2,206.69 on the Gilded Widget Scale.