From XCOM Wiki
Welcome to the XCOM Wiki!
XCOM Wiki is a comprehensive, community-based reference about the entire XCOM franchise, featuring the hit game "XCOM: Enemy Unknown", "XCOM: Enemy Within", and the upcoming "XCOM 2".
Learn all about:
XCOM: Enemy Unknown Coming to iOS!
XCOM: Enemy Unknown (iOS) is the newest title in the XCOM franchise, bringing the high fidelity XCOM title to mobile devices running the iOS platform. More information can be found at the iTunes Store Page.
Compatibility requirementsUFO: Enemy Unknown.
Sounds Like Aliens Will Invade Your Base in XCOM: Enemy Within
The 30 new achievements for XCOM: Enemy Within—the expansion for last year's XCOM: Enemy Unknown—slipped out to Steam a couple of weeks ago, but only now have I noticed what they describe. From the list, we can assume that a Base Defense mission is returning to the series.
XCOM: Enemy Within Announced
XCOM: Enemy Unknown has been announced for the PC, Xbox 360 and PS3! More info can be found here.