75		Fragments Blue (PlayStation 2, 2006)
72		Danganronpa V3: Killing Harmony (PlayStation 4, 2017)
70		√Letter (PlayStation 4, 2016)
70		Danganronpa V3: Killing Harmony - Demo Ver. (PlayStation 4, 2017)
44		Kono Hareta Sora no Shita de (Sūryō Genteiban) (PlayStation 2, 2005)
44		Kono Hareta Sora no Shita de (PlayStation 2, 2005)
44		Tsuki wa Kirisaku: Tantei Sagara Kyōichirō (PlayStation 2, 2005)
44		School Rumble: Nerujō wa Sodatsu. (PlayStation 2, 2005)
44		Rim Runners (PlayStation 2, 2005)
43		Konohana 4: Yami o Harau Inori (PlayStation 2, 2004)
42		Steins;Gate 0 (PlayStation 4, 2016)
42		428: Shibuya Scramble (PlayStation 4, 2018)
42		428: Shibuya Scramble (PlayStation 3, 2009)
42		Steins;Gate (PlayStation 3, 2015)
42		Hyakko: Yorozuya Jikenbo! (PlayStation 2, 2009)
42		Konohana 3: Itsuwari no Kage no Mukou ni (PlayStation 2, 2003)
41		Konohana 2: Todokanai Requiem (PlayStation 2, 2002)
40		Steins;Gate Elite (PlayStation 4, 2018)
40		Kindaichi Shōnen no Jikenbo: Jigoku Yūen Satsujin Jiken (PlayStation, 1998)
40		Jikū Tantei DD 2: Hangyaku no Apsalar (PlayStation, 1998)
40		Konohana: True Report (PlayStation, 2001)
40		Steins;Gate 0 (PlayStation 3, 2015)

Notes: Games similar to I/O, Games like I/O, Regista Ltd., GoodNavigate Co., Ltd., PlayStation 2, Adventure, Cyberpunk, Dark Sci-Fi, Anime, Manga, Visual Novel, Detective, Mystery, 3rd-person, Other, Sony PlayStation, PSX, PS1, PS2, PS3, PS4, Game Similarities.