XCOM: Enemy Within trailer. br Shop CGR t-shirts and mugs! br br Classic Game Room’s CGR Trailers presents a “War Machines” trailer for XCOM: ENEMY WITHIN from Firaxis and 2K Games. Take a look at some of the modifications that players will be able to utilize to truly create some powerful war machines. This gameexpansion pack will be released on November 12, 2013 for the PC, PlayStation 3 and Xbox 360. This is a downloadable title on Steam, PlayStation Network and Xbox Live Arcade. This game is rated Mature (M) by the ESRB.