“XCOM: Enemy Within” is an expansion to the original “XCOM: Enemy Unknown” storyline, enhancing the narrative with new elements and challenges. The core story remains focused on the Earth’s defense against a global alien invasion, with the player leading the secret paramilitary organization known as XCOM.

In “Enemy Within”, the storyline expands to include the threat of genetic modification and cybernetics, as XCOM not only battles the alien invaders but also contends with the ethical implications of using alien technology to enhance their own soldiers. The introduction of Meld, a new resource found on battlefields, allows for these enhancements but also adds a sense of urgency to missions, as Meld canisters have a self-destruct timer.

The expansion also introduces a new human enemy, EXALT, a secretive organization that seeks to use the alien invasion for its own gain. EXALT operates covertly, sabotaging XCOM’s efforts and spreading panic. Players must manage this internal threat by sending covert operatives to infiltrate EXALT cells and gather intelligence, leading to missions where players must extract their operatives or eliminate EXALT forces.

Throughout the game, players face difficult decisions that affect the narrative’s direction. These choices include prioritizing which countries to assist, managing the panic levels across continents, and determining how to use limited resources effectively. The game’s story is also influenced by the player’s success or failure in combat missions, research directions, and base management strategies.

The narrative of “XCOM: Enemy Within” is one of desperation and resilience, as humanity fights for survival against overwhelming odds. The expansion’s added layers of intrigue with EXALT and the moral quandaries of using alien technology deepen the story and provide a more immersive experience for players.

Overall, “XCOM: Enemy Within” offers a rich and expanded narrative that builds upon the foundation laid by “XCOM: Enemy Unknown”, delivering a compelling tale of humanity’s struggle against both external and internal threats.