Venus

Known as the Earth's twin, Venus is known for its incredibly diverse culture and inhabitants, primarily due to its varied colonial history. Terraforming of the planet began with Project Washington in 2347, making Venus one of the last projects in the system. With 250 years as a variable stage planet, Venus was thought to become a failed project, though the United Nations refused to pull the plug on it, claiming it had good faith the planet would become habitable. After the announcement in 2599 that the planet would be able to sustain human life, immigrants flocked to the planet from all corners of Earth and Mars, seeking a new life in the wake of the UN Civil War and the Ares-Central War.

Geology
Once called a literal hell, Venus is now known for a wide variety of climates. However, there are still remnants of Venus's past as a living nightmare. An entire toxic swamp known as the Sulfur Fields exists, a place riddled with peculiar plants and animals. Some areas also experience acid rains every few months, though these are easily predicted, making their danger fairly minimal.

The three largest continents are Ishtar Terra, Lada Terra, and Aphrodite Terra. Lada is the most inhospitable of the three, holding not only the Sulfur Fields, but a massive desert known as the Red Lands. A single city is on Lada, known as Sulfur City, due to its proximity to the eponymous fields.

Venus is 80% covered in water, slightly more than her counterpart Earth. Various unique aquatic lifeforms inhabit the planet's oceans, including a massive species of shark, the Charianodon Cytherae.

Japanese Empire
Capital: Shotyo

The Japanese Empire was once a small nation on Earth, but in the wake of Venus's colonization, the Emperor decreed that Japan would become a major force on Venus, effectively expanding its power far beyond what it could reach on the cramped Earth. Based on the Aphrodite Terra continent, the Japanese Empire supplies 40% of planetary commerce through manufacturing and technology design.

Crater Kingdom
Capital: Craterport

Built inside the Mead Crater, the Crater Kingdom was founded by John Wallace I of Venus, a wealthy industrialist who became fed up with the backroom politics of the Colonial Authority Group. Though small, the Kingdom commands a large percentage of planetary profits, directly competing with the Japanese Empire.

Colonial Authority Group
Capital: Port Washington

The Colonial Authority Group was once a collection of investors helping fund the colonization projects to Mars. Upon seeing the potential benefit of controlling a colony, the CAG funded several endeavors, including the colonization of Venus, which they seeked as a flagship world. As the land opened for habitation, the CAG claimed massive amounts before beginning an aggressive campaign to move as many people to Venus as possible. Now situated on the Ishtar Terra and Beta Regio continents, the CAG is the largest and most powerful nation on Venus so far.