Level-5 CEO Akihiro Hino stated in 2008 that more Atamania titles were under consideration, but aside from Mystery Room, none have since been announced.

[2] In Surōn to Makuhēru no Nazo no Sutōrī (スローンとマクヘールの謎の物語, Paul Sloane and Des MacHale's Intriguing Tales), the player is tasked with solving lateral thinking puzzles, a type of puzzle created by authors Paul Sloane and Des MacHale.

[3] In lateral thinking puzzles, the player is given bare details about a strange circumstance, and the goal is to deduce what happened through a series of yes–no questions.

The second pair was released on October 8, 2009; it consisted of Dai-3-Shū: Fushigi no Kuni no Nazotoki Otogibanashi (第3集 不思議の国の謎解きおとぎ話, Episode 3: A Puzzle-Solving Fairytale in Wonderland) and Dai-4-Shū: Taimu Mashin no Nazotoki dai Bōken (第4集 タイムマシンの謎解き大冒険, Episode 4: A Puzzle-Solving Trip on a Time Machine).

[6] The two worked in the "Final Investigation Room", and would solve crimes based solely on information they have gathered from other detectives.

[8] The game was to be played by selecting a crime from a list of options, and then using the touch screen of the Nintendo DS to examine materials.

[9] The title was later given a "Spring 2011" release date, but it would again be delayed indefinitely to "deliver a product of desired quality.".