Star Trek Hidden Frontier - 2000 Enemy Unknown Part 2 1-2 was released on: USA: 2000
Star Trek Hidden Frontier - 2000 Enemy Unknown Part 3 1-3 was released on: USA: 2000
Harbormaster - 1957 Enemy Unknown 1-8 was released on: USA: 14 November 1957
Tales of Tomorrow - 1951 Enemy Unknown 1-12 was released on: USA: 23 November 1951
The Angry Joe Show - 2009 XCOM Enemy Unknown 4-20 was released on: USA: 15 October 2012
The Aeropens
You can get the enemy Intel in campaign. Where there will be hidden and you will have to search for them.
Star Wars The Clone Wars - 2008 The Hidden Enemy 1-16 was released on: USA: 6 February 2009 Germany: 5 April 2009 Netherlands: 30 May 2009 Japan: 14 July 2009
XCOM Enemy Unknown - 2012 VG is rated/received certificates of: Germany:16 Singapore:ADV UK:12 USA:M
Among the Enemy is the 5th book.
Clevver Games - 2011 XCOM Enemy Unknown 1st PC Screen Shots New Gameplay Demo and Digital Sales Open was released on: USA: 7 September 2012
Karl Goodman has written: 'Unknown Enemy'