X Quest is an MMO based around the TV series, and will allow players to enter the world and interact with reality show contestants.
XCOM: Enemy Within
XCOM: Enemy Within is an expansion to the strategy game XCOM: Enemy Unknown. It adds new abilities, upgrades, and weapons to combat new enemy and alien threats. This expansion pack also introduces new maps, new tactical and strategic gameplay, and new multiplayer content.
XCOM: Enemy Unknown
The developer of the Civilization franchise takes a shot at another cherished strategy series.
X-Men Destiny is an action role-playing game in which you control the fate of a new mutant in the X-Men universe.
Xotic is a unique hybrid of the first-person shooter and arcade genres.