The Civilisation Game of Mastodonia is a massive, environmentally stunning nation, ruled by Shepard Blaine with an even hand, and notable for its daily referendums, state-planned economy, and anti-smoking policies. The compassionate, democratic, cheerful population of 4.174 billion Mastodonians are fiercely patriotic and enjoy great social equality; they tend to view other, more capitalist countries as somewhat immoral and corrupt.

The enormous, socially-minded government prioritizes Education, with Administration, Environment, and Healthcare also on the agenda. It meets to discuss matters of state in the capital city of The City. The average income tax rate is 98.5%.

The frighteningly efficient Mastodonian economy, worth 753 trillion Postagestamps a year, is driven entirely by a combination of government and state-owned industry, with private enterprise illegal. The industrial sector, which is highly specialized, is mostly made up of the Information Technology industry, with significant contributions from Tourism and Book Publishing. Average income is an impressive 180,519 Postagestamps, and distributed extremely evenly, with practically no difference between the richest and poorest citizens.

The military maintains a fierce arsenal of 'Cure Missiles', criminals rejoice in the streets as the entire police force is sent away on a training retreat, exceptionally healthy police officers can sprint after crooks for hours on end, and most of the nation's wealthy aristocrats are dentists. Crime, especially youth-related, is totally unknown, thanks to a capable police force and progressive social policies in education and welfare. Mastodonia's national animal is the mastodon, which frolics freely in the nation's many lush forests, and its national religion is Project Pope.

Mastodonia is ranked 73,379^th in the world and 832^nd in 10000 Islands for Most Politically Free, scoring 68.57 on the Diebold Election Inking Scale.