Chaos;Head: Noah / Chaos;Child Double Pack (Steelbook Launch Edition) cover or packaging material - MobyGames
Spike Chunsoft, Inc. on Twitter: "To celebrate the #ROBOTICSNOTES DOUBLE PACK announcement, @FUNimation gave us #ChaosHead, #ChaosChild and #RoboticsNotes Blu-Ray bundles to give away! To enter, follow @SpikeChunsoft_e and like & retweet
Regarding the Steam Version of CHAOS;HEAD NOAH : r/Games
Chaos;Head NoAH, Steins;Gate, and others now on PS4/PS5 through Japan's PlayStation Plus - Kiri Kiri Basara
Amazon.co.jp: CHAOS;CHILD - PS4 : おもちゃ
Chaos;Head Noah / Chaos;Child Double Pack coming west on October 7 - Gematsu