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I/O

TitleI/O
Aliasesアイオー
Play timeLong (40h36m from 18 votes)
DeveloperRegista
PublishersGN Software & Asgard (asugarudo)
Lemnisca Translations
Tuna std.
LinksWikipedia (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"

Amnesiac ProtagonistS 3.0 Disappearance 3.0 Drastic Character DevelopmentS 3.0 DreamS 3.0 Enforced Playing Order 3.0 Fighting Protagonist 3.0 Flashback 3.0 Infodumping 3.0 Interdimensional OdysseyS 3.0 Internet 3.0 Mesopotamian MythologyS 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 ProblemsS 3.0 Scenario Selection 3.0 Transhumanism 3.0 Unlockable Event 3.0 Unlockable Protagonist 3.0 Unlockable Routes 3.0 Virtual RealityS 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 FlashforwardS 2.9 Terrorism 2.9 Death of HeroineS 2.9 Fighting Heroine 2.9 Protagonist with Multiple PersonalitiesS 2.9 Hacker Protagonist 2.8 ADV 2.8 Existential CrisisS 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 HeroineS 2.8 Identity CrisisS 2.8 Track Display 2.8 Female Protagonist 2.8 Alternate DimensionsS 2.7 Built-in Encyclopedia 2.7 Male Protagonist 2.7 Orphan ProtagonistS 2.7 Cyborg HeroineS 2.7 AI HeroS 2.7 Cyborg ProtagonistS 2.7 Protagonist with Superpowered SideS 2.7 Unavoidable Death of HeroineS 2.7 Death of HeroS 2.6 ResurrectionS 2.6 Twin Tail Heroine 2.6 High School Student Protagonist 2.6 Time TravelS 2.6 Mystery 2.5 Protagonist with a Face 2.5 Strong Female Protagonist 2.5 Time LoopS 2.4 Varying Ending Songs 2.4 AI ProtagonistS 2.3 Bad Endings with Story 2.3 Death of ProtagonistS 2.3 DesperationS 2.3 HomicideS 2.3 Playtime Counter 2.3 Date Display 2.3 Secret Identity 2.3 Philosophy 2.2 RevengeS 2.2 ApocalypseS 2.2 Genetic ResearchS 2.2 Protagonist's Childhood Friend as a Heroine 2.2 Personal Armed Combat 2.2 Hard Science Fiction 2.1 Orphan HeroineS 2.1 Protagonist with Heterochromia 2.1 SuicideS 2.1 Albino HeroineS 2.1 Depression 2.1 Brief NVL Scenes 2.1 Twin Sister Support CharacterS 2.1 Clone HeroineS 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 DramaS 2.0 Multiple Credit Rolls 2.0 Pistol Combat 2.0 Protagonist's Twin as a Heroine 2.0 Pure Love StoryS 2.0 Reverse Trap HeroineS 2.0 SuperpowersS 2.0 Surreal 2.0 Suspense 2.0 Unique Routes 2.0 AmnesiaS 1.9 Descriptions of Violence 1.9 Blind HeroineS 1.8 Romance 1.7 Rabbits 1.5 SacrificeS 1.5 Villainous HeroineS 1.5 Scientist Hero 1.4 Heroine with Glasses 1.4 Medical Doctor Heroine 1.4 Father Support Character 1.3 Villainous HeroS 1.3 Christian Mythology 1.1 Lesbian HeroineS 1.1 Brief Branches Only 1.0 DuelS 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 ProtagonistS 0.8 Genre ShiftS 0.8 Student Heroine 0.8 Few Choices 0.7 Bad Ending(s) 0.7 Bloody ScenesS 0.7 Heroine with Gothic Look 0.5 Protagonist Gender Choice 0.3

Releases

Japanese (3)
2006-01-2615+I/O - First Press Limited Edition
2006-01-2615+I/O - Regular Edition
2008-08-2915+I/O revision II
English (1)
2014-02-2215+I/O revision II (unofficial patch)
Chinese (1)
2020-04-3015+I/O revision II (unofficial patch)
Russian (1)
TBAAll agesI/O (unofficial patch)

Staff

Full character list

Character summary

Aoi HinataProtagonist
HeProtagonist
IshtarProtagonist
IshtarProtagonist
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
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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Recent votes(show all)
2 reviews »
manicsteiner82021-12-02
phantom-zero-127.92021-11-29
goodend6.82021-11-27
ZeroWinters92021-11-27
umishon582021-11-26
daox62021-11-14
taylimildi62021-11-05

Ranking

Popularity: ranked #240 with a score of 6.97

Bayesian rating: ranked #283 with a rating of 7.52

Screenshots

I/O revision II

Screenshot sf537Screenshot sf539Screenshot sf540Screenshot sf541Screenshot sf542Screenshot sf544Screenshot sf549

I/O revision II

Screenshot sf154491Screenshot sf154492Screenshot sf154493