
A psychological suspense thriller adventure game exploring the line between hallucination and reality. The narrative follows a wave of serial murders called the New Generation Madness, set in Shibuya in 2009. This is the completed version of the previously unfinished Chaos;Head, marking the first full installment in the Science Adventure Series.
| X360 | February 26, 2009 |
| PSP | June 24, 2010 |
| iOS | November 18, 2010 |
| Android | January 24, 2012 |
| PS3 | November 22, 2012 |
| Vita | August 21, 2014 |
| Switch | February 23, 2022 |
| PC | October 7, 2022 |

| Audio | Subtitles | Interface | |
|---|---|---|---|
| English (US) | ✓ | ✓ | |
| 日本語 | ✓ | ✓ | ✓ |