Aurora v2.6.0 Patch Notes - September 6th 2025

Ground Unit Training Costs by Population

For v2.6, the training costs of ground formations with special capabilities may be reduced depending on where they are trained, based on the conditions at the time training begins. If a ground unit class has special capabilities, such as desert warfare capability, high gravity gravity capability, etc., those capabilities will be provided for free if the formation is trained on a planet where those conditions occur naturally.

For example, assume a new type of infantry unit is designed (Desert Raider), with personal weapons, heavy armour (x2), desert warfare capability (x1.25) and extreme temperature capability (x1.5), which will cost 0.375 BP. A formation of 2000 Desert Raiders has a size of 10,000 tons and cost of 750 BP. If the formation is trained on a desert planet, the formation cost will be 600 BP (750 / 1.25). If it is trained on a desert planet with a temperature outside the range of the species population, the cost will be 400 BP.

This is to simulate that it is more effective to train ground forces for extreme conditions or environments, if the training takes place within those environments. It also adds interesting decisions about where to train ground forces, rather than stacking all ground force construction complexes in a single location, and should create a more interesting force mix.

It is possible that conditions on a planet may change over time, so to avoid complexity, the cost is determined at the time the task begins. If formations are in a queue, the cost will be checked at the moment they begin training.

The ‘normal’ cost for formations will be shown on the ground forces window. Any reduced cost for training will be shown on the GU training tab of each population.

The following capabilities are free under the listed environments:

  • High Gravity. Planet has gravity higher than population species maximum.

  • Low Gravity. Planet has gravity lower than population species minimum.

  • Extreme Pressure. Planet has pressure higher than population species maximum.

  • Extreme Temperature. Planet has temperature lower than population species minimum or higher than population species maximum

  • Mountain Warfare. Planet has a dominant terrain type that includes the words ‘Mountain’ or ‘Alpine’.

  • Desert Warfare. Planet has a dominant terrain type that includes the words ‘Desert’ or ‘Arid’.

  • Jungle Warfare. Planet has a dominant terrain type that includes the words ‘Jungle’ or ‘Rainforest’.

  • Rift Valley Warfare. Planet has a dominant terrain type that includes the word ‘Rift Valley’.