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Kickstarter backers who pledged $25 or more to Reactive Studios' Cygnus Codebook — an interactive radio drama for iOS devices — received a numbered copy of the limited first edition of Cygnus Codebook today.
The codebook, which contains a collection of decoding assignments, complete with notes from the writer to the editor, is marked as "top secret" and is intended to train "agents" in decrypting codes.
In addition to the codebook, Reactive Studios announced that a big update that includes the remaining episodes of Mission 1 will release today.
Polygon's preview of Codename Cygnus can be read here.