The Purity victory, the Exodus Gate, requires you to reach Purity Affinity Level 13 and research the 'Transcendence' technology. Once these prerequisites are met, you can begin construction of the Exodus Gate Wonder. This is a massive undertaking, requiring significant Production and strategic resources. During construction, rival Sponsors will likely attempt to sabotage or conquer your cities, so ensure your defenses are robust. The Exodus Gate allows you to bring a new wave of colonists from Earth, establishing a new human civilization on the alien world. Successfully completing the Exodus Gate and defending it until the final turn will grant you a Purity victory. Focus on high Production cities and a strong defensive military to protect your construction sites.
