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> Tags: 2686
Releases: 80729
Producers: 12050
Staff: 23892
Characters: 97857
> Traits: 2959

I/O

Title	I/O
Aliases	アイオー
Play time	Long (40h36m from 18 votes)
Developer	Regista
Publishers	GN Software & Asgard (asugarudo) Lemnisca Translations Tuna std.
Links	Wikipedia (en), Wikipedia (ja), Wikidata, MobyGames, MobyGames, GameFAQs, HowLongToBeat, VNStat
Shops	» US$ 69.90 @ PlayAsia
Description April 26th, 2032 A.D. - Megalopolis Tokyo - 00:12 in the morning A total lunar eclipse occurs for the first time in 3 years. Even though it's supposed to be a simple astronomical phenomenon, it soon sets off a series of unexpected events. Unexplainable mysteries, terrorist incidents, and network crime surge as if in unison. The truth mixes with lies, as if the world is awake but still sleeping. Something has begun. Somewhere no one can see. Something no one knows about. This is a story of the chance meeting and tragic parting of the young men and women living in this world. Players get to play the game from 4 different points of view: Route A - Hinata, a youth who has lost his sister and himself. Route B - Ishtar, a freelance programmer and leader of a hacker team. Route C - Ishtar, but seems a bit different from the Ishtar in Route B.... Route D - He, a man completely shrouded in mystery. And thus.. "The beginning is the end, and the end is the beginning"

contentsexual contenttechnicalhide spoilersshow minor spoilersspoil me!summaryall

Amnesiac Protagonist^S 3.0 Disappearance 3.0 Drastic Character Development^S 3.0 Dream^S 3.0 Enforced Playing Order 3.0 Fighting Protagonist 3.0 Flashback 3.0 Infodumping 3.0 Interdimensional Odyssey^S 3.0 Internet 3.0 Mesopotamian Mythology^S 3.0 Mid-game Videos 3.0 More Than Seven Endings 3.0 Multiple Protagonists 3.0 Protagonist Selection 3.0 Protagonist with a Sprite 3.0 Psychological Problems^S 3.0 Scenario Selection 3.0 Transhumanism 3.0 Unlockable Event 3.0 Unlockable Protagonist 3.0 Unlockable Routes 3.0 Virtual Reality^S 3.0 Cyberpunk 2.9 Mind Screw 2.9 Hacking 2.9 Combat with Firearms 2.9 Hacker Heroine 2.9 Protagonist with Voice Acting 2.9 Unlockable Choices 2.9 Corporations 2.9 Flashforward^S 2.9 Terrorism 2.9 Death of Heroine^S 2.9 Fighting Heroine 2.9 Protagonist with Multiple Personalities^S 2.9 Hacker Protagonist 2.8 ADV 2.8 Existential Crisis^S 2.8 Hacker Hero 2.8 Completion Status Indicator 2.8 Multiple Route Mystery 2.8 Unlockable Bonus Content 2.8 No Sexual Content 2.8 AI Heroine^S 2.8 Identity Crisis^S 2.8 Track Display 2.8 Female Protagonist 2.8 Alternate Dimensions^S 2.7 Built-in Encyclopedia 2.7 Male Protagonist 2.7 Orphan Protagonist^S 2.7 Cyborg Heroine^S 2.7 AI Hero^S 2.7 Cyborg Protagonist^S 2.7 Protagonist with Superpowered Side^S 2.7 Unavoidable Death of Heroine^S 2.7 Death of Hero^S 2.6 Resurrection^S 2.6 Twin Tail Heroine 2.6 High School Student Protagonist 2.6 Time Travel^S 2.6 Mystery 2.5 Protagonist with a Face 2.5 Strong Female Protagonist 2.5 Time Loop^S 2.4 Varying Ending Songs 2.4 AI Protagonist^S 2.3 Bad Endings with Story 2.3 Death of Protagonist^S 2.3 Desperation^S 2.3 Homicide^S 2.3 Playtime Counter 2.3 Date Display 2.3 Secret Identity 2.3 Philosophy 2.2 Revenge^S 2.2 Apocalypse^S 2.2 Genetic Research^S 2.2 Protagonist's Childhood Friend as a Heroine 2.2 Personal Armed Combat 2.2 Hard Science Fiction 2.1 Orphan Heroine^S 2.1 Protagonist with Heterochromia 2.1 Suicide^S 2.1 Albino Heroine^S 2.1 Depression 2.1 Brief NVL Scenes 2.1 Twin Sister Support Character^S 2.1 Clone Heroine^S 2.0 Combat Capable Friends 2.0 Denpa 2.0 Ending List 2.0 Future 2.0 Future Japan 2.0 Game Over 2.0 Group of Friends 2.0 High Amount of Bad Endings 2.0 Life and Death Drama^S 2.0 Multiple Credit Rolls 2.0 Pistol Combat 2.0 Protagonist's Twin as a Heroine 2.0 Pure Love Story^S 2.0 Reverse Trap Heroine^S 2.0 Superpowers^S 2.0 Surreal 2.0 Suspense 2.0 Unique Routes 2.0 Amnesia^S 1.9 Descriptions of Violence 1.9 Blind Heroine^S 1.8 Romance 1.7 Rabbits 1.5 Sacrifice^S 1.5 Villainous Heroine^S 1.5 Scientist Hero 1.4 Heroine with Glasses 1.4 Medical Doctor Heroine 1.4 Father Support Character 1.3 Villainous Hero^S 1.3 Christian Mythology 1.1 Lesbian Heroine^S 1.1 Brief Branches Only 1.0 Duel^S 1.0 Food Discussions 1.0 Leader Heroine 1.0 Protagonist's Younger Sister as a Heroine 1.0 Heroine with Heterochromia 0.9 Protagonist's Blood-related Sister as a Heroine 0.8 Villainous Protagonist^S 0.8 Genre Shift^S 0.8 Student Heroine 0.8 Few Choices 0.7 Bad Ending(s) 0.7 Bloody Scenes^S 0.7 Heroine with Gothic Look 0.5 Protagonist Gender Choice 0.3

Releases

Japanese (3)

2006-01-26	15+	I/O - First Press Limited Edition	2 Official website ErogameScape
2006-01-26	15+	I/O - Regular Edition	3 Official website ErogameScape US$ 69.90PlayAsia
2008-08-29	15+	I/O revision II	2 Official website ErogameScape

English (1)

2014-02-22

15+

I/O revision II (unofficial patch)

Fanpatch was removed due to translation group going official.

Translator: Blick Winkel, GundamAce
QC: Kilicool64
Image Editor: Bu-Bu San
Engineer: Roger Pepitone

Chinese (1)

2020-04-30

15+

I/O revision II (unofficial patch)

Translation by Lem Fan Club.
Simplified Chinese.
Look here if you cannot access to the website.
https://www.bilibili.com/read/cv5850175

Russian (1)

TBA

All ages

I/O (unofficial patch)

Staff

Scenario
Nakazawa TakumiScenario concept/design/overall senior supervision, Routes E/E'
Oohara HiroyukiRoutes C/C'
Shin TomohiroRoutes D/D'/A'
Takashiro AoiRoutes B/B'
Takerube NobuakiScenario plot/design assistance/overall supervision, Route A
Character design
Soyosoyo
Composer
OnokenBGM, OP "fragment" ED "Lead out"
Shikura ChiyomaruInsert song "To The Moon"
Vocals
AyaneInsert song "To The Moon"
Misawa AkiOP "fragment"
Takahashi ChiakiED "Lead Out"

Artist
Soyosoyo
Director
Nakazawa TakumiDirected PS2 version, supervising director of PC version.
Satou DaisukeSenior director of PC version.
Staff
Hosoda KuniharuPlanning, producer
Ichinoe JunCGs, color design, title logo (Revision II)
Kanzuki YashiroMovie
Mju:zMovie production
Murakami JunSound effects
Nakayama HiroakiProgramming (PS2)
Nakazawa TakumiOriginal concept, planning, producer, PR
Satou DaisukeScripting
Shinkawa SatoruPlanning assistant, Scripting
Takano MasamichiPlanning assistant, quality assurance
Tanaka RomeoOriginal concept, planning
Umeda NobuakiSystem graphics
Yamada AkihisaProgramming (PS2)

Scenario
Nakazawa TakumiScenario concept/design/overall senior supervision, Routes E/E'
Oohara HiroyukiRoutes C/C'
Shin TomohiroRoutes D/D'/A'
Takashiro AoiRoutes B/B'
Takerube NobuakiScenario plot/design assistance/overall supervision, Route A
Artist
Soyosoyo
Director
Nakazawa TakumiDirected PS2 version, supervising director of PC version.
Satou DaisukeSenior director of PC version.

Character design
Soyosoyo
Composer
OnokenBGM, OP "fragment" ED "Lead out"
Shikura ChiyomaruInsert song "To The Moon"
Vocals
AyaneInsert song "To The Moon"
Misawa AkiOP "fragment"
Takahashi ChiakiED "Lead Out"

Staff
Hosoda KuniharuPlanning, producer
Ichinoe JunCGs, color design, title logo (Revision II)
Kanzuki YashiroMovie
Mju:zMovie production
Murakami JunSound effects
Nakayama HiroakiProgramming (PS2)
Nakazawa TakumiOriginal concept, planning, producer, PR
Satou DaisukeScripting
Shinkawa SatoruPlanning assistant, Scripting
Takano MasamichiPlanning assistant, quality assurance
Tanaka RomeoOriginal concept, planning
Umeda NobuakiSystem graphics
Yamada AkihisaProgramming (PS2)

Scenario
Nakazawa TakumiScenario concept/design/overall senior supervision, Routes E/E'
Oohara HiroyukiRoutes C/C'
Shin TomohiroRoutes D/D'/A'
Takashiro AoiRoutes B/B'
Takerube NobuakiScenario plot/design assistance/overall supervision, Route A
Artist
Soyosoyo

Character design
Soyosoyo
Vocals
AyaneInsert song "To The Moon"
Misawa AkiOP "fragment"
Takahashi ChiakiED "Lead Out"

Composer
OnokenBGM, OP "fragment" ED "Lead out"
Shikura ChiyomaruInsert song "To The Moon"
Director
Nakazawa TakumiDirected PS2 version, supervising director of PC version.
Satou DaisukeSenior director of PC version.

Staff
Hosoda KuniharuPlanning, producer
Ichinoe JunCGs, color design, title logo (Revision II)
Kanzuki YashiroMovie
Mju:zMovie production
Murakami JunSound effects
Nakayama HiroakiProgramming (PS2)
Nakazawa TakumiOriginal concept, planning, producer, PR
Satou DaisukeScripting
Shinkawa SatoruPlanning assistant, Scripting
Takano MasamichiPlanning assistant, quality assurance
Tanaka RomeoOriginal concept, planning
Umeda NobuakiSystem graphics
Yamada AkihisaProgramming (PS2)

Full character list

Character summary

Aoi HinataProtagonist

Voiced by
Hagi Michihiko
Matsuzono RuiChild

HeProtagonist

IshtarProtagonist

Voiced by Takahashi Chiaki

IshtarProtagonist

Voiced by Takahashi Chiaki

Amane YayoiMain character

Voiced by Yoshida Airi

Aoi MutsukiMain character

Voiced by Nagata Kayo

EnlilMain character

Voiced by Aida Sayaka

Kawahara SakuyaMain character

Voiced by Tanaka Ryouko

AndrasSide character

Voiced by Aoki Tsuyoshi

Aoi MitsuhikoSide character

Voiced by Misono Yukihiro

Ayase MikaSide character

Voiced by Fujisaki Kaori

ChiquititaSide character

Voiced by Oka Tetsuya

Igarashi KousakuSide character

Voiced by Koga Hiroyuki

Kawahara TooruSide character

Voiced by Yamamoto Hirofumi

Miyata KousukeSide character

Voiced by Toriumi Kousuke

NingirsuSide character

Voiced by Aoki Tsuyoshi

Shinozuka MasamiSide character

Voiced by Yoshizumi Kozue

Shinozuka MayumiSide character

Voiced by Yoshizumi Kozue

Wadatsumi MegumiSide character

Voiced by Yanase Natsumi

User stats

Vote stats
687 votes total, average 7.63 (good)
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