XCOM: Enemy Within for Windows
XCOM: Enemy Within expands the Enemy Unknown experience with new abilities, weapons, enemy threats and layers of squad development. This page focuses on the PC experience and practical campaign preparation.
What Enemy Within adds
Enemy Within introduces additional soldier customization through gene modification and MEC-related systems, plus new content and decisions in the tactical and strategic game.
Enemy Within vs Enemy Unknown
If you already know the base game, expect more build decisions and more competition for resources. For a first campaign, learning cover, scouting and mission pacing remains more important than any single upgrade.
Windows installation and save considerations
Verify the PC edition you own and check whether the expansion is included. Keep your saves separate when changing versions, configurations or installing third-party modifications.
Common campaign planning mistakes
Avoid committing all resources to one upgrade path before checking squad coverage. Upgrade decisions should support mission reliability, not only short-term damage numbers.
Frequently asked question
Is XCOM EW the same as XCOM: Enemy Within?
Yes. “XCOM EW” is a common abbreviation for Enemy Within.
Sources and related Windows guides
2K Newsroom: XCOM Ultimate Collection
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.