Kid A Mnesia Exhibition, an interactive experience with music and artwork from the albums, was released in the same month for PlayStation 5, macOS and Windows.

[8] Kid Amnesiae also includes alternative versions of "Morning Bell" and the B-sides "Fog" and "Fast-Track",[1] and isolated string tracks from "How to Disappear Completely" and "Pyramid Song".

[9] On 1 April 2021, Radiohead joined the social media platform TikTok and began posting short videos featuring their character Chieftain Mews.

[13] Radiohead released Kid A Mnesia merchandise including a bone china tea set,[14] and Yorke and Donwood produced two art books detailing the creative process of the albums.

[citation needed] Radiohead planned to create an art installation based on the albums, but this was canceled due to logistical problems and the COVID-19 pandemic.

[16] Instead, a digital experience, Kid A Mnesia Exhibition, was released in November as a free download for PlayStation 5, macOS and Windows.

[20] The Mojo critic Danny Eccleston noted the influence of Kid A and Amnesiac on subsequent acts that had blended rock and electronic music.

[6] The NME critic Andrew Trendell wrote that the bonus disc "feels like as much a complete album as you could hope for ... [It] not only offers a mood piece, but also a companion and secret history behind the making of two essential, landmark records.