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I/O

I/OSafe / Tame (14)
3 covers + 6 package artwork
Title
I/O
Aliasesアイオー
Play timeLong (43h45m from 57 votes)
DeveloperRegista
PublishersGN Software & Asgard Inc.
Lemnisca Translations
Lem Fan Club
LinksWikipedia (en), Wikipedia (ja), Wikidata, MobyGames, MobyGames, GameFAQs, HowLongToBeat, IGDB, Lutris
Shopssponsored links» 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"

Drastic Character Development (positive)S 3.0 Flashback 3.0 Infodumping 3.0 Internet 3.0 Mesopotamian Mythology 3.0 More Than Seven Endings 3.0 Multiple Protagonists 3.0 Protagonist Selection 3.0 Psychological ProblemsS 3.0 Scenario Selection 3.0 Thriller 3.0 Unlockable Event 3.0 Unlockable Protagonist 3.0 Unlockable Routes 3.0 Virtual Reality 3.0 Cyberpunk 2.9 DreamS 2.9 Mind Screw 2.9 Hacking 2.9 Protagonist with Voice Acting 2.9 Corporations 2.9 Fighting Protagonist 2.9 Transhumanism 2.9 Existential CrisisS 2.8 Mid-game Videos 2.8 Terrorism 2.8 Unlockable Choices 2.8 FlashforwardS 2.8 Multiple Route Mystery 2.8 Track Display 2.8 Disappearance 2.8 Identity CrisisS 2.8 Protagonist with a Sprite 2.8 Hacker Protagonist 2.8 ADV 2.8 Alternate DimensionsS 2.8 Combat with Firearms 2.8 Built-in Encyclopedia 2.8 Protagonist with Multiple PersonalitiesS 2.8 Unlockable Bonus Content 2.7 Cyborg ProtagonistS 2.7 Female Protagonist 2.7 Completion Status Indicator 2.7 Enforced Playing Order 2.7 Interdimensional OdysseyS 2.7 Male Protagonist 2.7 ResurrectionS 2.7 Orphan ProtagonistS 2.6 Protagonist with a Face 2.6 Protagonist with Superpowered SideS 2.6 Mystery 2.6 High School Student Protagonist 2.5 Time TravelS 2.5 Amnesiac ProtagonistS 2.5 Clinical Depression 2.5 Confinement in a Simulated RealityS 2.5 Future 2.5 Future Japan 2.5 Multiple Credit Rolls 2.5 Philosophy 2.5 Strong Female Protagonist 2.5 Hacker Heroine 2.4 No Sexual Content 2.4 Playtime Counter 2.4 RevengeS 2.4 Death of ProtagonistS 2.4 Time LoopS 2.4 Hacker Hero 2.3 Death of HeroineS 2.3 Fighting Heroine 2.3 AI ProtagonistS 2.3 Varying Ending Songs 2.3 Date Display 2.3 Secret Identity 2.3 DesperationS 2.2 High Amount of Bad Endings 2.2 AI HeroineS 2.2 Hard Science Fiction 2.2 Cyborg HeroineS 2.2 Personal Armed Combat 2.2 Bad Endings with Story 2.2 Genetic ResearchS 2.2 HomicideS 2.2 Life and Death DramaS 2.2 AI HeroS 2.1 Protagonist with Heterochromia 2.1 ApocalypseS 2.1 SuicideS 2.1 Surreal 2.1 Brief NVL Scenes 2.1 Death of HeroS 2.0 Twin Tail Heroine 2.0 Combat Capable Friends 2.0 Detective Work 2.0 Ending List 2.0 Game Over 2.0 Group of Friends 2.0 Pistol Combat 2.0 Programmer Protagonist 2.0 SuperpowersS 2.0 Suspense 2.0 Transgender Support CharacterS 2.0 Twin Sister Support CharacterS 2.0 Unique Routes 2.0 AmnesiaS 1.9 Descriptions of Violence 1.9 Protagonist's Childhood Friend as a Heroine 1.8 Rabbits 1.8 Romance 1.7 Albino HeroineS 1.7 Pure Love StoryS 1.7 SacrificeS 1.7 Orphan HeroineS 1.6 Food Discussions 1.5 Blind HeroineS 1.4 Depression (obsolete) 1.3 Unavoidable Heroine DeathS 1.3 Father Support Character 1.3 Medical Doctor Heroine 1.2 Scientist Hero 1.2 Christian Mythology 1.2 Heroine with Glasses 1.1 Buddhist Mythology 1.0 DuelS 1.0 Rain 1.0 Slapstick 1.0 Slice of Life ComedyS 1.0 Bloody Scenes 0.9 Lesbian HeroineS 0.9 Protagonist's Blood-related Sister as a Heroine 0.9 Heroine with Heterochromia 0.9 Villainous HeroineS 0.9 Early Branching Plot 0.8 Villainous HeroS 0.8 Genre ShiftS 0.5 Reverse Trap HeroineS 0.5 Bad Ending(s) 0.5 Leader Heroine 0.5 Villainous ProtagonistS 0.4 Student Heroine 0.4 Brief Branches Only 0.3 Heroine with Gothic Look 0.3 Few Choices 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 (simplified) (1)
2020-04-3015+I/O revision II (unofficial)

Staff

Original edition
Lemnisca Translations' translation (unofficial)

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
916 votes (rank 345)
7.59 average (rank 1020)
10
115
9
179
8
264
7
178
6
80
5
43
4
31
3
18
2
4
1
4
Recent votes(show all)
5 reviews »
wi11ysma11102026-03-23
FragmentSky102026-03-21
wz18207102026-03-17
Paracletus92026-03-15
tyatay42026-03-13
hidden62026-03-12
Shewanako82026-03-03

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Screenshots

I/O revision II

Screenshot sf189213Screenshot sf189214Screenshot sf189216Screenshot sf189217Screenshot sf189218Screenshot sf189219Screenshot sf189220

I/O revision II

Screenshot sf154491Screenshot sf154492Screenshot sf154493