Sid Meier's Civilization 3: Conquests -

The expansion introduced several mechanics that fundamentally altered the Civilization III experience:

: Two new tiers were added above Deity: Demigod and Sid . On "Sid" difficulty, the AI receives massive bonuses, such as starting with extra Settlers and having significantly lower production costs. Sid Meier's Civilization 3: Conquests

: A new unit type that can appear when a civilization is the first to research a technology. They can be used to "rush" any city improvement or Great Wonder, though their secondary ability to trigger a "Scientific Golden Age" is famously bugged in the retail version. the AI receives massive bonuses