The short answer to "What is XCOM?" is something like this:
Featuring a bold new origin story told from a first-person perspective, XCOM pits Special Agent William Carter and his team against the threat of human extinction from an insidious otherworldly force. But every enemy is an opportunity – players will strike surgically against the alien menace, capture their technology, and by the science of desperation – turn the invaders' weapons against them.
If you were looking for something more in depth, 2K Marin have released their first Developer Diary for their upcoming FPS reimagining of XCOM
. The team dive into the background of the game's origin story, the creation of XCOM
as an organization. They then take gamers on a tour of the base, where the game's character, weapon and story development all take place.
If that hasn't given you enough information, why not check out the 22 minute long Demo Walkthrough Video
from this year's E3.XCOM
is scheduled for release on March 6th, 2012 in North America and March 9th in Europe.