Hangar 18

Hangar 18 is a secret achievement in Deus Ex: Human Revolution.

After rescuing Megan and the rest of the kidnapped scientists from Omega Ranch, Jensen will be left alone in the hangar. While Malik is flying them out of harm's way, Megan will contact Adam let him know how to get to Panchaea, but before leaving make sure to hack the terminal to decrypt the Hangar 18 email.

From the bottom of the steps make a left and then another quick left. A box will be covering a little hole in the wall move it crouch down, enter and hack the computer. In the same room, there is a Cooling System upgrade for the Heavy/Plasma rifle.

Trivia
The Achievement is named both literally (It is located in the 18th Hangar of Omega Ranch) and as a reference to a 1990 song by Megadeth (Itself a reference to the famous Hangar 18 at Area 51).

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