View source for Radio

[[File:Portal_Radio.png|right|thumb|The Radio in ''Portal''|200px]]
{{Quotation|'''Adventure Core'''|Here, let me put on some adventure music.|sound=Adventure_core_encouragement13.wav}}

'''Radios''' are miscellaneous items that appear in the ''Portal'' series, and appear as simple analogue AM/FM radios set to 85.2 FM. Radios are introduced at the very beginning of ''[[Portal]]'', and also make a brief appearance in ''[[Portal 2]]''. When Radios are encountered, they are usually switched on and play an up-tempo version of the tune from the end of Portal {{spoiler text|("[[Portal soundtrack#7. Still Alive - 2:56|Still Alive]]")}}.

The Radios in Portal did not originally serve any obvious purpose, and appeared to be present merely in order to provide ambiance. The [[March 1, 2010 Patch (Portal)|March 1, 2010]] patch however, added 26 additional Radios to the game, most of which were hidden in Test Chambers, and also added a new [[Achievements|achievement]], "Transmission Received". This patch, its accompanying achievement and patch notes were later revealed to be part of the [[Portal ARG]]. Among other things, the patch altered the Radios so that they would emit a {{W|Morse Code}}-like signal when placed in certain locations within a test chamber, and locating all 26 of these areas was required in order to unlock the achievement.

Radios do not play a large role in ''Portal 2'', and appear only twice, both times in Chapter 2.

==Trivia==
*In Chapter 2: The Cold Boot, Test Chamber 3, a Radio can be found in the corner of one of Ratman's Dens. Instead of playing the usual up-tempo tune ([[File:Looping radio mix.wav]]), the Radio plays The National's Exile Villify, only once, for its full length. 
*In the same chapter, in Test Chamber 6, a Radio can be found among the "garbage" that is ejected from the [[Vital Apparatus Vent]], and is necessary to complete the "Final Transmission" achievement.


==Related Achievements==
===Portal===
{{Achievement table
| 1 = {{Show achievement|Portal|Transmission Received}}
}}

===Portal 2===
{{Achievement table
| 1 = {{Show achievement|Portal 2|Final Transmission}}
}}