Report an issue on this page.

I/O

TitleI/O
Aliasesアイオー
LengthLong (30 - 50 hours)
DeveloperRegista
PublishersGN Software & Asgard (asugarudo)
Lemnisca Translations
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"

Scenario Selection 3.0 Fighting Protagonist 3.0 Enforced Playing Order 3.0 Unlockable Event 3.0 Internet 3.0 Unlockable Protagonist 3.0 Disappearance 3.0 Mid-game Videos 3.0 Unlockable Routes 3.0 Mystery 3.0 Protagonist with a Sprite 3.0 Virtual RealityS 3.0 Mesopotamian MythologyS 3.0 Transhumanism 3.0 Infodumping 3.0 DreamS 3.0 More Than Seven Endings 3.0 Flashback 3.0 Bad Ending(s) 3.0 Protagonist Selection 3.0 Multiple Protagonists 3.0 Cyberpunk 2.9 Mind Screw 2.9 Hacker Heroine 2.9 Unlockable Choices 2.9 Hacking 2.9 Protagonist with Voice Acting 2.9 Combat with Firearms 2.9 FlashforwardS 2.9 Terrorism 2.9 Death of HeroineS 2.9 Fighting Heroine 2.9 CorporationsS 2.9 Protagonist with Multiple PersonalitiesS 2.9 Existential CrisisS 2.8 ADV 2.8 Hacker Protagonist 2.8 Hacker Hero 2.8 Multiple Route Mystery 2.8 Unlockable Bonus Content 2.8 Completion Status Indicator 2.8 Personal Armed Combat 2.8 Track Display 2.8 AI HeroineS 2.8 Identity CrisisS 2.8 No Sexual Content 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 Unavoidable Death of HeroineS 2.7 Protagonist with Superpowered SideS 2.7 ResurrectionS 2.6 Twin Tail Heroine 2.6 Death of HeroS 2.6 High School Student Protagonist 2.6 Time TravelS 2.6 Hard Science Fiction 2.5 Protagonist with a Face 2.5 Varying Ending Songs 2.4 Playtime Counter 2.3 Leader Heroine 2.3 Bad Endings with Story 2.3 Time LoopS 2.3 AI ProtagonistS 2.3 HomicideS 2.3 DesperationS 2.3 Secret Identity 2.3 Date Display 2.3 Death of ProtagonistS 2.3 Genetic ResearchS 2.2 ApocalypseS 2.2 Orphan HeroineS 2.1 Protagonist's Childhood Friend as a Heroine 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 SuperpowersS 2.0 Pistol Combat 2.0 Early Branching Plot 2.0 Reverse Trap HeroineS 2.0 Combat Capable Friends 2.0 Student Heroine 2.0 RevengeS 2.0 Group of Friends 2.0 Clone HeroineS 2.0 Surreal 2.0 Game Over 2.0 Protagonist's Twin as a Heroine 2.0 Denpa 2.0 Scientist Hero 2.0 Philosophy 2.0 High Amount of Bad Endings 2.0 Strong Female Protagonist 2.0 Protagonist Gender Choice 2.0 AmnesiaS 1.9 Descriptions of Violence 1.9 Medical Doctor Heroine 1.8 Heroine with Glasses 1.8 Blind HeroineS 1.8 Romance 1.7 Life and Death DramaS 1.7 Heroine with Gothic Look 1.7 Villainous HeroineS 1.5 Lesbian HeroineS 1.5 SacrificeS 1.5 Father Support Character 1.3 Villainous HeroS 1.3 Heroine with Heterochromia 1.3 Protagonist's Blood-related Sister as a Heroine 1.2 Ending List 1.0 Christian Mythology 1.0 Brief Branches Only 1.0 Villainous ProtagonistS 0.8 Genre Shift 0.8 Few Choices 0.7 Bloody Scenes 0.5

Releases

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

Staff

Full character list

Character summary

Aoi HinataProtagonist
HeProtagonist
Voiced by Hagi Michihiko
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
Kawahara TooruMain character
AndrasSide character
Voiced by Aoki Tsuyoshi
Ayase MikaSide character
Voiced by Fujisaki Kaori
ChiquititaSide character
Voiced by Oka Tetsuya
Hiiragi MidoriSide character
Voiced by Kochi Tamako
Igarashi KousakuSide character
Voiced by Koga Hiroyuki
InagakiSide character
Voiced by Oka Tetsuya
Miyata KousukeSide character
Voiced by Toriumi Kousuke
Wadatsumi MegumiSide character
Voiced by Yanase Natsumi

User stats

Vote stats
598 votes total, average 7.61 (good)
10
63
9
125
8
190
7
109
6
53
5
23
4
20
3
11
2
1
1
3
Recent votes(show all)
nixartuxn82020-12-02
coldfire8382020-11-27
applemons72020-11-27
itrigs82020-11-10
yubiseiharukana82020-10-24
baisuposter62020-10-19
sonichack72020-10-14
maato-chan92020-09-29

Ranking

Popularity: ranked #231 with a score of 6.92

Bayesian rating: ranked #274 with a rating of 7.50

Screenshots

I/O revision II

Screenshot sf537Screenshot sf539Screenshot sf540Screenshot sf541Screenshot sf542Screenshot sf543Screenshot sf544Screenshot sf547Screenshot sf548Screenshot sf549