From the makers of Sid Meier's Civilization comes a game about civilization's last stand. As the commander of an elite paramilitary organization known as XCOM, you control Earth's defenses against a terrifying alien invasion. This package includes the award-winning XCOM: Enemy Unknown base game and XCOM: Enemy Within expansion, plus all of the released add-on content. **XCOM: Enemy Unknown Features** * **Strategic Base:** Detect and intercept the alien threat as you build and expand your XCOM headquarters. Recruit, customize, and develop unique operatives. Manage your personnel and negotiate with governments around the world. * **Tactical Combat:** Direct your squad in fierce turn-based ground battles, engage in cover operation, and rescue civilians in crowded cities and desolate outlands around the world. * **Research Alien Technology:** Recruit scientists and engineers to unlock more advanced weapons, armor, and abilities. **XCOM: Enemy Within Features** * **Additional Soldier Abilities:** Research a new alien technology to advance the capabilities of your operatives at a genetic level using Gene Mods or engineer MEC suits for heavy support in the field. * **Additional Weapons and Equipment:** Give your operatives an extra tactical edge with new projects from your engineering team and the Foundry. * **Additional Enemy Threats:** Adopt new tactics to counter the threats from a new human enemy known as EXALT and two new aliens, the Seeker and Mechtoid. * **New Strategic Resource:** A valuable new alien resource, known as MELD, has been released onto the landscape providing access to new research and upgrades.