Building modules are enhancements that can be attached to various structures to improve their performance. They come in different rarities (common, uncommon, rare, epic, legendary) and provide a wide range of bonuses. Examples include: Production Efficiency Modules (increase output), Energy Efficiency Modules (reduce energy consumption), Upkeep Reduction Modules (lower maintenance costs), Population Density Modules (increase residential capacity), and Hazard Protection Modules (reduce meteor damage on the Moon). Modules are acquired through expeditions, corporate challenges, trading, and sometimes as quest rewards. Always prioritize placing modules on your most critical or bottlenecked production facilities to maximize their impact. Remember that modules can be freely moved between compatible buildings.
