The newsletter is a mailing list by Cardboard Computer, initially made available to players who had purchased the game. Instructions on how to sign up to receive the newsletter are located in the game's installation folder. In November 2018, Cardboard Computer announced in a public post that the newsletter had been "largely superseded" by their Patreon, posting a link to an archive of the previous issues.
The newsletter archive can be found at http://kentuckyroutezero.com/pub/newsletter-archive/.
Updates not included in the archive
- February 18, 2013: Accessing your copy of Kentucky Route Zero on Humble Store
- February 23, 2013: Retrieving your "Kentucky Route Zero" Steam key
- February 10, 2014: Kentucky Route Zero Act III Progress Update
- September 24, 2014: Kentucky Route Zero prints & Steam sale
- May 2, 2015: A MAZE. Recap - Microwaves & A Talk About Text