As a part of the Portal 2 ARG in 2011, the community received a song called "Searching, Emergance, Discover", with the artist tag "Unknown sender". http://valvearg.com/wiki/Valve_ARG_Wiki...
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Unknown Sender has had 7 concerts.
Unknown Sender is most often considered to be Electronic, UK Hip Hop, and Unknown.
The last Unknown Sender concert was on December 07, 2019 at The Windjammer in New York, New York, United States. The bands that performed were: Electric Street Queens / Penny / Frank Sechich / Ghettoblasters / Unknown Sender.
