The game supports Steam Workshop , allowing players to create and download custom content. While there isn't a widely known official "Prophet" feature, a modder could have named a specific building or tool this way.

If you're working on a data science project, you might be referring to using for feature engineering in a time-series model.

Combining Prophet features with basic models has been shown to significantly improve accuracy on leaderboards, sometimes moving a model from the top 40% to the top 10%. 2. Cities XXL Gaming

It sounds like you're interested in the crossover between the city-building game and the Prophet time-series forecasting library. This combination is often discussed in two different contexts: 1. Data Science & Forecasting (Most Likely)

If you are looking for a literal "Prophet" feature or mod within the game itself:

Standard features in Cities XXL include managing over 1,000 buildings, 47 architectural styles, and handling localized pollution levels like noise and smoke.

In this context, a "Prophet feature" usually refers to using the library's components (like trend, weekly/yearly seasonality, or holiday effects) as input features for a larger machine learning model (e.g., XGBoost or Random Forest).