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Xenology - Biological Module (Ever Universe)

Stellaris version 4.0.* - English only (other localizations are not maintained but are still available)

For a diverse and realistic range of traits.

This mod was originally developed by Devious (2021), and later taken over and updated by President Memes (2022-2024). Xenology has now once again fallen into a state of disrepair since President Memes officially ended support for it. As I absolutely love this mod and everything it has to offer, I have took it upon myself to update Xenology for as long as I can. As always, if the original author wishes me to take this down at any point in time, I will do so. However, until then, I will keep Xenology afloat through the rough tides that are Stellaris updates.


Xenology aims to make every species truly unique, each with its own strengths and weaknesses. Some are natural leaders, and others are born inept and dimwitted. No two alien species are alike. Many traits will even generate special leaders with more specialized bonuses (or maluses), incentivizing the violent conquest or peaceful assimilation of alien races and adding their unique characteristics to your own. Alternatively, you may choose to preserve the purity of your empire to best benefit from the traits of one or very few species. Each trait describes a unique aspect of a species' biology or psychology. There is no boring, linear tier system or confusion between societal tenets and biological attributes.

Leader traits are always guaranteed to spawn on all relevant leaders. This greatly improves both balance and AI performance. In addition, the player won't have to hire and fire a dozen leaders in hopes of generating the one they're looking for.

XTE alters very few vanilla objects for improved compatibility with other mods. There are no additional trait points or picks, and no increased cost of gene-modding (though traits worth more than 3 and less than -3 still require advanced gene-modding to add or remove after game start).


♦ 43 New species traits (biological and lithoid)
• 26 Positive traits
• 17 Negative traits
♦ 50 New leader traits
• Many new leader traits require certain species traits
• Leader generation is usually guaranteed for relevant traits
• New leader traits do not take up a slot
• Traits for Councilors are less efficient the more of them you have


The only thing XTE overwrites is five (5) modifier tooltips via scripted_modifiers:
- num_tech_alternatives_add
- BIOLOGICAL_species_trait_points_add
- LITHOID_species_trait_points_add
- ROBOT_species_trait_points_add
- country_megastructure_build_cap_add

Huge thanks to Devious for creating this awesome mod for us Stellaris players to enjoy, and also to President Memes for maintaining and improving Xenology for 2 years after the original was abandoned. I will try to keep this mod up to date and continue the same tradition.