| Title | Released | Role | As | Note |
| Remember11 -The Age of Infinity- | 2004-03-18 | Scenario | Hayashi Naotaka | Kokoro's Route |
| Memories Off ~Sorekara~ | 2004-06-24 | Scenario | Hayashi Naotaka | Inori, Karin and Haya routes |
| Hayarigami - Keishichou Kaii Jiken File | 2004-08-05 | Scenario | Hayashi Naotaka | |
| Memories Off #5 Togireta Film | 2005-10-27 | Scenario | Hayashi Naotaka | Mahiro and Asuka routes |
| Memories Off ~Sorekara Again~ | 2006-03-23 | Scenario | Hayashi Naotaka | "Feeling Affection" |
| Memories Off #5 Encore | 2007-07-12 | Scenario | Hayashi Naotaka | |
| 12Riven -The Ψcliminal of Integral- | 2008-03-13 | Scenario | Hayashi Naotaka | |
| Chaos;Head | 2008-04-25 | Scenario | Hayashi Naotaka | |
| L no Kisetsu 2: Invisible Memories | 2008-07-02 | Scenario | Hayashi Naotaka | |
| Chaos;Head Noah | 2009-02-26 | Scenario | Hayashi Naotaka | |
| Steins;Gate | 2009-10-15 | Scenario | Hayashi Naotaka | |
| Chaos;Head Love Chu☆Chu! | 2010-03-25 | Scenario | Hayashi Naotaka | |
| Steins;Gate Hiyoku Renri no Darling | 2011-06-16 | Staff | Hayashi Naotaka | Scenario supervision |
| Steins;Gate Hen'i Kuukan no Octet | 2011-10-28 | Scenario | Hayashi Naotaka | |
| Robotics;Notes | 2012-06-28 | Scenario | Hayashi Naotaka | |
| Steins;Gate Senkei Kousoku no Phenogram | 2013-04-25 | Scenario | Hayashi Naotaka | "The Caged Bird Sings" (writing), "Lunar Bifröst" |
| Steins;Gate Senkei Kousoku no Phenogram | 2013-04-25 | Staff | Hayashi Naotaka | Scenario supervision |
| Disorder 6 | 2013-08-22 | Staff | Hayashi Naotaka | Special thanks |
| Chaos;Child | 2014-12-18 | Scenario | Hayashi Naotaka | Hana route, most of the common route delusion triggers |
| Chaos;Child | 2014-12-18 | Staff | Hayashi Naotaka | Detailed plot (Hana route), general scenario supervision |
| Steins;Gate 0 | 2015-12-10 | Scenario | Hayashi Naotaka | Absolute Zero, Closed Epigraph, X-day Protocol, Pandora’s Box, Gehenna's Stigma, Presage or Recognize, Vega and Altair, Milky-Way Crossing |
| Steins;Gate 0 | 2015-12-10 | Staff | Hayashi Naotaka | Scenario supervision |
| Plastic Memories | 2016-10-13 | Scenario | Hayashi Naotaka | |
| Plastic Memories | 2016-10-13 | Composer | Hayashi Naotaka | OP lyrics |
| Plastic Memories | 2016-10-13 | Staff | Hayashi Naotaka | Original work, scenario supervision |
| Robotics;Notes DaSH | 2019-01-31 | Scenario | Hayashi Naotaka | |
| Robotics;Notes DaSH | 2019-01-31 | Staff | Hayashi Naotaka | Scenario supervision |
| Anonymous;Code | TBA | Staff | Hayashi Naotaka | Scenario supervision |