I/O (アイオー Aiō?) is a Japanese science fiction visual novel produced by Regista. It was released for the PlayStation 2 on January 26, 2006 in Japan and was released on PC on August 29, 2008 in Japan. I/O was written and directed by Takumi Nakazawa, the writer and director for KID's infinity...
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There are three.
Oi you guys! Stop being a lazy a** and do something!
This page is so damn outdated...
Another thing: If you noticed guys, most visual novels and sometimes light novel are the most op.....I/O, umineko, shinza banshou..Nasuverse..