XCOM: Enemy Unknown for Windows PC
XCOM: Enemy Unknown is the 2012 tactical strategy game that brought the series into a modern turn-based format. Command a response to an alien invasion while balancing field missions, research, engineering and global support.
How XCOM: Enemy Unknown works
The game alternates between tactical missions, where cover, action points, positioning and line of sight matter, and a strategic base layer where you choose research projects, facilities and funding priorities.
A practical approach to your first campaign
Use reliable cover and avoid revealing too much unexplored terrain on the final soldier move. Bring soldiers with complementary roles, maintain an equipment budget and avoid spreading your resources across every research branch at once.
Enemy Unknown vs Enemy Within
Enemy Unknown is the core game. Enemy Within is its expanded version with new mechanics and missions; it is not the same game as XCOM 2 or War of the Chosen.
Windows PC notes
Use the version appropriate to your Windows setup and check the retailer’s published requirements. Keep backed-up saves before installing mods, editing configuration files or changing launch options.
Frequently asked question
Is XCOM: Enemy Unknown the first XCOM game?
No. The series has earlier games, including X-COM: UFO Defense. Enemy Unknown is the 2012 modern reboot.
Sources and related Windows guides
2K Support: XCOM Enemy Unknown
All Windows guides · Best XCOM games · XCOM 2 · Chimera Squad
Editorial note: This article summarizes published game information and does not claim hands-on testing of every Windows configuration. Updated October 21, 2026.