I/O

I/O
TitleI/O
Aliasesアイオー
LengthLong (30 - 50 hours)
LinksWikipedia
DeveloperRegista
Publishers Asgard (asugarudo) & GN Software
 Lemnisca Translations
 Tuna std.
Available atJapanese PlayStation 2 version at Play-Asia.com for US$ 0.00 »
Japanese PlayStation 2 version at Play-Asia.com for US$ 69.90 »

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

Protagonists

Aoi Hinata
Aoi Hinata葵 日向 AB
Birthday17 March
Hair, Brown, Shoulder-length, Spiky Bangs, V Bangs
Eyes, Tsurime, Violet
Body, Pale, Slim, Teen
Clothes, Boots, Capri Pants, Jacket, Necktie, Trousers, Wristband
Personality, Boku, Docile, Loner, Protective, Stoic
Role, Cyborg, High School Student, Older Brother, Superhuman, Tsukkomi, Twin Brother
Engages in, Time Travel
Subject of, Attempted Homicide, Avoidable Death, Clinical Depression, Injury, Resurrection, Time Loop
Voiced byHagi Michihiko
Matsuzono Rui (Child)

Description

Protagonist of Route A, a youth leaving his innocence behind.
Age: 15.

2 years after the disappearance of his twin sister, Hinata leads a dull school life. Depressed and devoid of any goals, his life drastically changes after receiving a mysterious text message from his supposedly dead sister.

He
Heヒィ 
Hair, Brown, Curtained, Parted in Middle, Short, Spiky Bangs
Eyes, Hidden, Hosome, Violet
Body, Pale, Slim, Young-adult
Clothes, Belt, Gloves, Jacket, Necktie, Sunglasses, Trench Coat
Items, Brass Knuckles, Handgun, Shotgun
Personality, Cold-hearted, Distrustful, Mysterious, Ore, Stoic
Role, Artificial Intelligence, Cyborg, Hacker, Superhuman
Engages in, Justifiable Homicide, Murder, Revenge, Time Travel
Subject of, Amnesia, Avoidable Death, Other Route Death, Resurrection, Time Loop
Voiced byHagi Michihiko

Description

Protagonist of Route D, a robust man.

The lone hacker of urban legends. His name and origin are unknown. Not leaving any traces has lead many to question his very existence.
<hidden by spoiler settings>Seeks vengeance for the death of his loved one, "He" desperately continues fighting against "that organization".

Ishtar
Ishtarイシュタル O
Birthday1 November
Hair, Ankle Length, Black, Intake, Parted to Side
Eyes, Brown, Heterochromia, Teal
Body, Pale, Slim, Young-adult
Clothes, Belt, Earrings, Gothic, Jacket, Thigh-high Boots, Trench Coat
Personality, Atashi, Brave, Carefree, Cold-hearted, Curious, Honorable, Kind, Loner, Mature, Mysterious, Naive, Relaxed
Role, Artificial Intelligence, Coder, Cyborg, Gang Leader, Ghost, Hacker, Half-sister, Lonely, Orphan, Superhuman
Engages in, Investigation, Justifiable Homicide, Self-sacrifice, Time Travel
Subject of, Death, Resurrection, Time Loop
Voiced byTakahashi Chiaki

Description

Protagonist of Route B, a young woman followed by companions.
Age: 18.

The charismatic leader of hacker team "Criminal". She sports a cheerful personality, but is also an able people person, rightfully deserving her position and receiving her comrades' unconditional trust.

<hidden by spoiler settings>She dies at the end of Route B 1.0 at the hands of HE who, by accident, traps her in a hallway filled with toxic gas which kills her. Her consciousness escapes her body and manifests itself into sentient data ('Shadow Null'), alongside the rest of the Criminal gang.

Ishtar
Ishtarイシュタル O
Birthday1 November
Hair, Ankle Length, Black, Spiky Bangs
Eyes, Brown, Heterochromia, Teal, Tsurime
Body, Pale, Slim, Young-adult
Clothes, Belt, Boots, Bracelet, Collar, Earrings, Jacket, Sunglasses, Trousers
Items, Handgun
Personality, Atashi, Brave, Cold-hearted, Curious, Loyal, Mature, Pretending, Relaxed, Third Person
Role, Coder, Cyborg, Gang Leader, Hacker, Secret Identity, Superhuman
Engages in, Justifiable Homicide, Rebellion, Time Travel
Subject of, Amnesia, Avoidable Death, Inferiority Complex, Time Loop, Weak Memory
Voiced byTakahashi Chiaki

Description

Protagonist of Route C, a young woman standing in solitude.
Age: 18.

She is searching for someone important.
Compared to Ishtar of Route B, she seems rather cold and aloof.

<hidden by spoiler settings>She is actually Shinozuka Mayumi, the sole member of "Criminal" left alive after Code's attack on eXarch's Tokyo Branch. She decided to assume Ishtar's image and personality after the original's death.

Main characters

Amane Yayoi
Amane Yayoi天音 弥生 B
Birthday9 October
Hair, Eye Covering, Shoulder-length, Spiky Bangs, Violet
Eyes, Hosome, Violet
Body, Pale, Slim, Young-adult
Clothes, Belt, Court Shoes, Earrings, High Heels, Lab Coat, Necktie, Pendant Necklace, Shirt, Skirt Suit
Personality, Kind, Relaxed
Role, Coder, Cyborg, Gang Leader, School Nurse, Superhuman
Subject of, Avoidable Death
Voiced byYoshida Airi

Description

Age: 24.

School doctor of Kyoka Senior High School. Being one of the few people who Hinata willingly associates with, she often acts as his confidant.

<hidden by spoiler settings>She is also the creator of net RPG "Babylon" and former leader of it's administering body "Anunnaki".

Aoi Mutsuki
Aoi Mutsuki葵 夢月 AB
Birthday17 March
Hair, Antenna, Parted in Middle, Parted to Side, Shoulder-length, White
Eyes, Red, Tareme
Body, Pale, Slim, Teen
Clothes, Pajamas, Skirt, Vest
Personality, Antisocial, Spoiled
Role, Coder, Cyborg, Hacker, Hikikomori, Homosexual, Student, Superhuman, Twin Sister, Younger Sister
Subject of, Avoidable Death, Illness, Mental Affliction, Weakness
Voiced byNagata Kayo

Description

Age (at the time of her disappearance): 13.

Hinata's frail bodied twin sister. Prior to her disappearance, she had almost no social contacts apart from close family and tended to spend all her time with computers.

Ea
Eaエア 
Hair, Brown, Curly, Curtained, Long, No Bangs, Parted in Middle
Eyes, Green, Tareme
Body, Pale, Slim, Teen
Clothes, Boots, Dress, Ribbon Tie
Personality, Cold-hearted, Refined, Stubborn, Superficial
Role, Antagonist, Artificial Intelligence, Villain
Voiced byYanase Natsumi

Description

<hidden by spoiler settings>She was originally Megumi's Shadow. After the original's death, she became a Null.

Enlil
EnlilエンリルA
Birthday14 July
Hair, Curtained, Eye Covering, Long, No Bangs, Parted in Middle, White
Eyes, Hosome, Sanpaku Eyes, White
Body, Makeup, Pale, Reverse-trap, Slim, Teen
Clothes, Boots, Gloves, High Heels, Shirt, Suit
Personality, Cold-hearted, Mysterious, Transgender
Role, Antagonist, Cyborg, Hacker, Homosexual, Superhuman, Terrorist
Engages in, Fighting, Mass Murder, Murder
Subject of, Avoidable Death
Voiced byAida Sayaka

Description

Age: 23.

A mysterious stranger appearing in unexpected places. A person wrapped in mysteries.

<hidden by spoiler settings>Current head of net RPG "Babylon's" administering body and one of the game's founding members. Also the leader of terrorist organization "Code".

Isaiah Nagy
Isaiah Nagyアイゼーア・ナージ 
AliasesIzaiah Nagy
Hair, Blond, Spiky Bangs
Body, Pale, Slim, Teen
Personality, Silent
Role, Criminal, Cyborg, Hacker, Spirit, Superhuman
Engages in, Revenge, Suicide
Subject of, Confinement, Death, Disability, Resurrection
Voiced byHagi Michihiko

Description

<hidden by spoiler settings>First of the imaginary children.
He hacked and stole from eXarch's bank account to fund his own electric brain operation and his trip to Japan in order to meet with Ereshkigal. Was caught and prosecuted, then locked to eXarch's research facility.

Fed up with prison like life, he uploaded his consciousness to internet, then killed his body by frying his brain augments. Isaiah became the legendary hacker "He" after saving Shinozuka Mayumi from coma.

Izawa Nami
Izawa Nami井澤 奈美 
AliasesEreshkigal, エレシュキガル
Hair, Antenna, Brown, Parted to Side, Waist Length+
Eyes, Blue, Tareme, Teal
Body, Pale, Slim, Young-adult
Clothes, Robe
Role, Cyborg, Hacker, Superhuman
Subject of, Blindness
Voiced byNagata Kayo

Description

<hidden by spoiler settings>Ishtar's revered onee-sama. Left on a journey to find Isaiah Nagy's whereabouts. Former member of Anunnaki.
Also, the user of LEM (Una).

Kawahara Sakuya
Kawahara Sakuya川原 朔夜 B
Birthday25 July
Hair, Brown, Curtained, Long, Parted to Side, Spiky Bangs, Twin Tails
Eyes, Amber, Tareme
Body, Pale, Slim, Teen
Clothes, Boots, Clothing with Ribbons, High Heels, Knee-high Socks, Mini-dress, Necktie, Ribbon Hair Tie, Ribbon Tie, School Uniform, Shirt, Shorts, Skirt, Thigh-high Stockings, Turtleneck Shirt, Vest
Personality, Protective
Role, Artificial Intelligence, Childhood Friend, High School Student
Engages in, Cooking
Subject of, Avoidable Death, Death, Resurrection
Voiced byTanaka Ryouko

Description

Age: 15.

Hinata's childhood friend and classmate, who pesters him to no end, much to Hinata's dismay. She offers her help when Hinata starts searching for Mutsuki's whereabouts. She has an obvious crush on Hinata.

Side characters

Ayase Mika
Ayase Mika綾瀬 みか A
Birthday28 November
Hair, Blunt Bangs, Brown, Hime Cut, Short Bangs, Waist Length+
Eyes, Amber, Tareme
Body, Pale, Slim, Teen
Clothes, Beret, Boots, Glasses, Jacket, Necktie, Skirt, Vest
Personality, Serious, Strange, Stubborn
Role, Antagonist, Artificial Intelligence, Cyborg, Hacker, High School Student, Mechanic, Superhuman
Engages in, Murder
Subject of, Death, Resurrection, Stalking
Voiced byFujisaki Kaori

Description

Age: 17.

Devoted member of the hacker team "Criminal".
Acts as the team's system coordinator. Always at loggerheads with Kousuke.

Chiquitita
Chiquitita 
AliasesInagaki, 稲垣
Hair, Blond, Brown, Short
Body, Pale, Slim, Young-adult
Clothes, Belt, Fedora, Fingerless Gloves, Glasses, Vest
Items, Handgun
Role, Artificial Intelligence
Subject of, Avoidable Death
Voiced byOka Tetsuya

Description

Inagaki's virtual self in the Net RPG Babylon. <hidden by spoiler settings>Thanks to the AIO system, he can act on his own while Inagaki is offline.

Inagaki
Inagaki稲垣 
Hair, Blond
Body, Pale
Clothes, Glasses, School Uniform
Role, Classmate, Friend, Gamer, High School Student, Superhuman
Voiced byOka Tetsuya

Description

Hinata and Sakuya's classmate. Plays the Net RPG Babylon under the name Chiquitita.

Miyata Kousuke
Miyata Kousuke宮田 浩介 B
Birthday22 December
Hair, Green, Short, Spiky Bangs
Eyes, Green, Tareme
Body, Pale, Slim, Teen
Clothes, Dog Tags, Jacket, School Uniform, Torn Clothing, Trousers
Personality, Carefree, Food Lover, Funny, Hotblooded, Idiot, Old-fashioned
Role, Hacker, High School Student
Engages in, Cooking, Justifiable Homicide, Self-sacrifice
Subject of, Death, Resurrection
Voiced byToriumi Kousuke

Description

Age: 17.

Kousuke is Criminal's only male member and often the butt monkey of other members' jokes. He is the only member without a brain chip and as such tends to handle "brute forcing" and other tasks which require less finesse.

He has a strong sense of justice and acts as the team's "white knight in shining armor".

Wadatsumi Megumi
Wadatsumi Megumi綿津見 恵 O
AliasesEa, エア
Hair, Brown, Curly, Curtained, Long, No Bangs, Parted in Middle
Eyes, Green, Tareme
Body, Pale, Slim, Teen
Clothes, Boots, Dress, Ribbon Tie
Personality, Docile, Kind, Refined
Role, Hacker, High School Student, Musician, Superhuman
Engages in, Painting
Subject of, Death
Voiced byYanase Natsumi

Description

Age: 16.

Uses the handle "Ea".
One of the "Three Founding Gods of Babylon", Ea is also a member of the said Net RPG's current administrative body, "E-Doc".
She is also Ishtar's former friend.
<hidden by spoiler settings>She was killed by Enlil after refusing to cooperate with her.

Make an appearance

Aoi Himeka
Aoi Himeka葵 媛景 
Hair, Parted to Side, Short, Violet
Eyes, Pink, Tsurime
Body, Pale, Slim, Young-adult
Role, Mother
Subject of, Illness
Voiced byMatsuzono Rui

Description

Hinata's and Mutsuki's mother.

Frauros
Fraurosフラウロス 
AliasesFrau
Hair, Shoulder-length
Body, Kid
Clothes, Ribbon Hair Tie
Personality, Proactive, Protective
Role, Younger Sister
Engages in, Investigation
Voiced byKochi Tamako

Description

<hidden by spoiler settings>Andras' younger sister

Miyata Masayuki
Miyata Masayuki宮田 政行 
AliasesInvestigator Masayuki
Hair, Curly, Long, Stubble
Clothes, Jacket, Necktie, Trousers, Watch
Personality, Cautious, Sharp-tongued, Sly, Stoic, Workaholic
Role, Detective, Police
Engages in, Smoking
Subject of, Clinical Depression, Grief, Survival
Voiced byKatsunuma Kiyoshi

Description

Kosuke's father. A detective in the cyberforce. <hidden by spoiler settings>Following {Code}'s attack on {eXarch}, he is the sole survivor of {Code}'s culling of {Criminal} family members.