I/O

Developed by Regista
Release date: 26 Jan 2006
AdventureVisual Novel
I/O
Publisher: GN Software
Developer: Regista
Platforms: PlayStation 2
Player perspective: Text
Game modes: Single player
I/O is a Japanese sci-fi mystery visual novel developed by Regista set in a near future Japan, where you play one out of four protagonists and try to uncover the mystery surrounding the killing spree in Megalopolis Tokyo.