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Planetfall

Planetfall is a major gameplay mod affecting many parts of the game. Though the features you might notice the most are:

• Traditions are almost completely redone. The old traditions have new effects, and six new tradition trees have been added: Commerce, Piracy, Spaceborn, Exploration, Vigilance and Welfare.
• The Spaceborn tradition enables asteroid colonization: it allows you to “terraform” asteroids into Asteroid Bases, with unique districts based on the deposit the asteroid was providing, for example: mining districts for normal asteroids, hydroponics districts for ice asteroids, rare crystal districts for crystalline asteroids, and a spaceport district providing soldier jobs for everyone.
• More (dis)approval modifiers for the various political factions. The portion of your influence provided by factions has been doubled to make these modifiers more meaningful.
• There is now a research building line for each of the three research types: Quantum Computers for Physics, Biology Labs for Society, and Skunkworks for Engineering.
• Improved AI. Most I have written myself. Some I borrowed or adapted from Glavius or Starnet, because my mod was already editing the same files as them. This means, due to the large number of files edited, using other AI mods will either have no effect, or break Planetfall, depending on the loading order used.
• Planetfall does have a few AI improvements not seen in any other AI mod.
1) It terraforms worlds and is more willing to sign migration pacts, making them a more competitive colonizer compared to humans.
2) It will tend to merge its fleet into one giant doomstack, only creating smaller secondary fleets if it has at least one fleet the same size as the enemy's entire fleet.
3) Instead of vanilla's random mismatch of weapons and armor, it will have more focused ship designs, based on their own best technologies, but adapting ship designs to the fleet their enemies/rivals/neughbouring purifiers are using.

Planetfall is the name of a total conversion mod I made for Civilization 4, a remake of Sid Meier’s Alpha Centauri. I figured I’d also use the name for this mod because it’s also spacey science fiction, and because I’m lazy and can’t think of any other good name that would cover the wide array of changes this mod makes.

Credits to Glavius, Salvor and Girion (of Expanded Stellaris Traditions) for using some of their ideas and code as the starting point of my own implementation.

For version 2.8+