# List of Koei Tecmo games

This is a list of video games developed and/or published by Koei Tecmo, one of their internal development houses, or the pre-merger companies Tecmo (formerly known as Tehkan) or Koei. Some games were only published by Tecmo or Koei in a specific region or for a specific platform; these games will only list the publisher relevant to this list (i.e. Tecmo or Koei) and will be notated appropriately. Also, many games have different release dates for different regions, platforms, or re-releases. For the purposes of simplicity, and to ensure easy automated sorting, only the earliest date will listed on this table.
| Title | Japanese Title | Developer | Publisher | Series | Genre | Platforms | Year |
| 100man-nin no Kiniro no Corda | 100万人の金色のコルダ | Ruby Party | GREE/Koei | Kin'iro no Corda | Dating sim | Microsoft Windows, mobile phones | 2011 |
| 100man-nin no Sangokushi | 株式会社ディー・エヌ・エー | GREE/DeNA | Koei | Romance of the Three Kingdoms | Role-playing | Microsoft Windows, mobile phones | 2010 |
| Aerobiz | エアーマネジメント 大空に賭ける | Koei | Koei | Koei Executive | Business simulation | SNES, Sega Genesis | 1992 |
| Aerobiz Supersonic | エアーマネジメントII 航空王をめざせ | Koei | Koei | Koei Executive | Business simulation | SNES, Mega Drive | 1993 |
| Aibou DS | 相棒DS | Tecmo | Tecmo | None | Visual novel | Nintendo DS | 2009 |
| All Girl Wrestling: Ultimate Angels | | Tecmo | Tecmo | None | Sports-based Fighting | Super Famicom, mobile phones | 1989 |
| Angelique | アンジェリーク | Ruby Party | Koei | Angelique | Dating sim | Super Famicom, Game Boy Advance | 1994 |
| Angelique Duet | アンジェリーク デュエット | Ruby Party | Koei | Angelique | Dating sim | Sega Saturn, PlayStation, Nintendo DS | 1998 |
| Angelique étoile | アンジェリーク エトワール | Ruby Party | Koei | Angelique | Dating sim | Microsoft Windows, PlayStation 2 | 2003 |
| Angelique Special | アンジェリークSpecial | Ruby Party | Koei | Angelique | Dating sim | PC-FX, Microsoft Windows, Sega Saturn, PlayStation | 1995 |
| Angelique Special 2 | アンジェリークSpecial2 | Ruby Party | Koei | Angelique | Dating sim | PC-FX, Microsoft Windows, Sega Saturn, PlayStation, Classic Mac OS | 1996 |
| Angelique Tenkū no Requiem | アンジェリーク 天空の鎮魂歌 | Ruby Party | Koei | Angelique | Dating sim | PC-FX, PlayStation | 1998 |
| Angelique Trois | アンジェリーク トロワ | Ruby Party | Koei | Angelique | Dating sim | PlayStation 2 | 2000 |
| Aoki Ōkami to Shiroki Mejika | 蒼き狼と白き牝鹿 | Koei | Koei | Aoki Ōkami to Shiroki Mejika | Historical turn-based strategy | PC-88, PC-98, MSX | 1985 |
| Ar Nosurge | アルノサージュ ～生まれいずる星へ祈る詩 | Gust | Tecmo Koei | Surge Concerto | Role-playing | PlayStation 3, PlayStation Vita | 2014 |
| Arslan: The Warriors of Legend | アルスラーン戦記×無双 | Omega Force | Koei | The Heroic Legend of Arslan | Hack and slash | PlayStation 3, PlayStation 4, Xbox One, Microsoft Windows | 2015 |
| Atelier Annie: Alchemists of Sera Island | アニーのアトリエ ～セラ島の錬金術士～ | Gust | Koei | Atelier | Role-playing | Nintendo DS | 2009 |
| Atelier Ayesha: The Alchemist of Dusk | アーシャのアトリエ ～黄昏の大地の錬金術士～ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation 3, PlayStation Vita | 2012 |
| Atelier Elie: The Alchemist of Salburg 2 | エリーのアトリエ ～ザールブルグの錬金術士2～ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation, PlayStation 2, Sega Saturn, Microsoft Windows, Dreamcast, Game Boy Color, WonderSwan, mobile phones | 1998 |
| Atelier Elkrone: Dear for Otomate | エルクローネのアトリエ ~Dear for Otomate~ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation Portable | 2012 |
| Atelier Escha & Logy: Alchemists of the Dusk Sky | エスカ&ロジーのアトリエ ～黄昏の空の錬金術士～ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation 3, PlayStation Vita | 2013 |
| Atelier Firis: The Alchemist and the Mysterious Journey | フィリスのアトリエ ～不思議な旅の錬金術士～ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation 4, PlayStation Vita, Microsoft Windows | 2016 |
| Atelier Iris: Eternal Mana | イリスのアトリエ エターナルマナ | Gust | Koei | Atelier | Role-playing | PlayStation 2, mobile phones | 2004 |
| Atelier Iris 2: The Azoth of Destiny | イリスのアトリエ エターナルマナ2 | Gust | Koei | Atelier | Role-playing | PlayStation 2, mobile phones | 2005 |
| Atelier Iris 3: Grand Phantasm | イリスのアトリエ グランファンタズム | Gust | Koei | Atelier | Role-playing | PlayStation 2, mobile phones | 2006 |
| Atelier Judie: The Alchemist of Gramnad | ユーディーのアトリエ ～グラムナートの錬金術士～ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation 2, PlayStation Portable | 2002 |
| Atelier Lydie & Soeur: Alchemists of the Mysterious Painting | リディー&スールのアトリエ ～不思議な絵画の錬金術士～ | Gust | Koei Tecmo | Atelier | Role-playing | Microsoft Windows, PlayStation 4, PlayStation Vita, PlayStation TV, Nintendo Switch | 2017 |
| Atelier Lilie: The Alchemist of Salburg 3 | リリーのアトリエ ～ザールブルグの錬金術士3～ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation 2, Sega Saturn, Microsoft Windows, Dreamcast, mobile phones | 2001 |
| Atelier Lina: The Alchemist of Strahl | リーナのアトリエ 〜シュトラールの錬金術士〜 | Gust | Koei Tecmo | Atelier | Role-playing | Nintendo DS | 2009 |
| Atelier Lise: The Alchemist of Orde | リーズのアトリエ 〜オルドールの錬金術士〜 | Gust | Koei Tecmo | Atelier | Role-playing | Nintendo DS | 2007 |
| Atelier Lulua: The Scion of Arland | ルルアのアトリエ ～アーランドの錬金術士4～ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation 4, Nintendo Switch, Microsoft Windows | 2019 |
| Atelier Marie, Elie & Anis: Message on the Gentle Breeze | マリー、エリー&アニスのアトリエ 〜そよ風からの伝言〜 | Gust | Koei | Atelier | Role-playing | Game Boy Advance | 2003 |
| Atelier Marie: The Alchemist of Salburg | マリーのアトリエ ～ザールブルグの錬金術士～ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation, PlayStation 2, PlayStation Network, Sega Saturn, Microsoft Windows, Dreamcast, Game Boy Color, WonderSwan, mobile phones | 1997 |
| Atelier Meruru: The Apprentice of Arland | メルルのアトリエ ～アーランドの錬金術士3～ | Gust | Tecmo Koei | Atelier | Role-playing | PlayStation 3, PlayStation Vita, PlayStation 4, Nintendo Switch | 2011 |
| Atelier Online: Alchemists of the Brasier | アトリエ オンライン ～ブレセイルの錬金術士～ | Gust | Koei Tecmo | Atelier | Role-playing | Android, iOS | 2018 |
| Atelier Questboard | アトリエ クエストボード | Gust | Koei Tecmo | Atelier | Role-playing | Android, iOS | 2014 |
| Atelier Resleriana: The Red Alchemist & the White Guardian | 紅の錬金術士と白の守護者 〜レスレリアーナのアトリエ〜ティザートレーラー | Gust | Koei Tecmo | Atelier | Role-playing | Nintendo Switch, PlayStation 4, PlayStation 5, Microsoft Windows | 2025 |
| Atelier Rorona: The Alchemist of Arland | ロロナのアトリエ ～アーランドの錬金術士～ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation 3, PlayStation Vita, Nintendo 3DS, PlayStation 4, Nintendo Switch | 2009 |
| Atelier Ryza: Ever Darkness & the Secret Hideout | ライザのアトリエ 〜常闇の女王と秘密の隠れ家〜 | Gust | Koei Tecmo | Atelier | Role-playing | Nintendo Switch, PlayStation 4, Microsoft Windows | 2019 |
| Atelier Ryza 2: Lost Legends & the Secret Fairy | ライザのアトリエ2 ～失われた伝承と秘密の妖精～ | Gust | Koei Tecmo | Atelier | Role-playing | Nintendo Switch, PlayStation 4, PlayStation 5, Microsoft Windows | 2020 |
| Atelier Sophie 2: The Alchemist of the Mysterious Dream | ソフィーのアトリエ2 ～不思議な夢の錬金術士～ | Gust | Koei Tecmo | Atelier | Role-playing | Nintendo Switch, PlayStation 4, Microsoft Windows | 2022 |
| Atelier Ryza 3: Alchemist of the End & the Secret Key | ライザのアトリエ3 〜終わりの錬金術士と秘密の鍵〜 | Gust | Koei Tecmo | Atelier | Role-playing | Nintendo Switch, PlayStation 4, PlayStation 5, Microsoft Windows | 2023 |
| Atelier Shallie: Alchemists of the Dusk Sea | シャリーのアトリエ ～黄昏の海の錬金術士～ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation 3, PlayStation Vita | 2014 |
| Atelier Sophie: The Alchemist of the Mysterious Book | ソフィーのアトリエ ～不思議な本の錬金術士～ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation 3, PlayStation Vita | 2015 |
| Atelier Totori: The Adventurer of Arland | トトリのアトリエ ～アーランドの錬金術士2～ | Gust | Tecmo Koei | Atelier | Role-playing | PlayStation 3, PlayStation Vita, PlayStation 4, Nintendo Switch | 2010 |
| Atelier Viorate: The Alchemist of Gramnad 2 | ヴィオラートのアトリエ ～グラムナートの錬金術士2～ | Gust | Koei Tecmo | Atelier | Role-playing | PlayStation 2, PlayStation Portable | 2003 |
| Atelier Yumia: The Alchemist of Memories & the Envisioned Land | ユミアのアトリエ ～追憶の錬金術士と幻創の地～ | Gust | Koei Tecmo | Atelier | Role-playing | Nintendo Switch, Microsoft Windows, PlayStation 4, PlayStation 5, Xbox One, Xbox Series X/S | 2025 |
| Attack on Titan | 進撃の巨人 | Omega Force | Koei Tecmo | Attack on Titan | Action, hack and slash | Microsoft Windows, PlayStation 4, PlayStation 3, PlayStation Vita, Xbox One | 2016 |
| Attack on Titan 2 | 進撃の巨人2 | Omega Force | Koei Temco | Attack on Titan | Action, hack and slash | Nintendo Switch, Microsoft Windows, PlayStation 4, PlayStation Vita, Xbox One | 2018 |
| Attack on Titan: Escape from Certain Death | 進撃の巨人 死地からの脱出 | Ruby Party | Koei Tecmo | Attack on Titan | Visual novel | Nintendo 3DS | 2017 |
| Bad News Baseball | 激闘スタジアム | Tecmo | Tecmo | None | Sports video game | NES | 1989 |
| Bandit Kings of Ancient China | 水滸伝 天命の誓い | Koei | Koei | None | Turn-based strategy | NES, MS-DOS, Amiga OS, Macintosh | 1989 |
| BASTARD!! ONLINE | 暗黒の破壊神Online | Shaft | Tecmo | Bastard!! | Platform | Microsoft Windows | Cancelled |
| Berserk and the Band of the Hawk | ベルセルク無双 | Omega Force | Koei Tecmo | Berserk | Action role-playing, hack and slash | PlayStation 3, PlayStation 4, PlayStation Vita, Microsoft Windows | 2016 |
| Bladestorm: The Hundred Years' War | ブレイドストーム -百年戦争 | Omega Force | Koei | None | Historical action/strategy | PlayStation 3, Xbox 360, PlayStation 4 and Xbox One (Nightmare Remake) | 2007 |
| Blue Reflection | ブルー リフレクション 幻に舞う少女の剣 | Gust | Koei Tecmo | None | Role-playing | PlayStation 4, PlayStation Vita | 2017 |
| Bomb Jack | ボンジャック | Tehkan | Tehkan | Bomb Jack | Platform | Arcade | 1984 |
| Bomb Jack II | ボンジャックII | Tehkan | Tehkan | Bomb Jack | Platform | Arcade | 1986 |
| Bomb Jack Twin | | NMK | Tecmo | Bomb Jack | Platform | Arcade | 1993 |
| Brandish | ブランディッシュ | Nihon Falcom/Koei | Koei | Brandish | Action role-playing | SNES | 1994 |
| Breaker | | Tecmo | Tecmo | None | Co-op shooter | PlayStation 2 | Cancelled |
| Buddy Mission Bond | バディミッション BOND | Ruby Party | Nintendo | None | Visual Novel | Nintendo Switch | 2021 |
| Captain Tsubasa | キャプテン翼 | Tecmo | Tecmo | Captain Tsubasa | Traditional soccer simulation | Family Computer | 1988 |
| Captain Tsubasa (Mega-CD video game) | キャプテン翼 | Tecmo | Tecmo | Captain Tsubasa | Traditional soccer simulation | Sega Mega-CD | 1994 |
| Captain Tsubasa 2 | キャプテン翼II スーパーストライカー | Tecmo | Tecmo | Captain Tsubasa | Traditional soccer simulation | Family Computer | 1990 |
| Captain Tsubasa 3: Koutei no Chousen | キャプテン翼III 皇帝の挑戦 | Tecmo | Tecmo | Captain Tsubasa | Traditional soccer simulation | Super Famicom | 1992 |
| Captain Tsubasa 4: Pro no Rival Tachi | キャプテン翼IV プロのライバルたち | Tecmo | Tecmo | Captain Tsubasa | Traditional soccer simulation | Super Famicom | 1993 |
| Captain Tsubasa 5: Hasha no Shogo Campione | キャプテン翼V 覇者の称号カンピオーネ | Tecmo | Tecmo | Captain Tsubasa | Traditional soccer simulation | Super Famicom | 1994 |
| Celtic Tales: Balor of the Evil Eye | ケルトの聖戦 | Koei | Koei | None | Medieval fantasy simulation | MS-DOS | 1995 |
| Champion Jockey: G1 Jockey & Gallop Racer | | Koei | Tecmo Koei | None | Horse racing | PlayStation 3, Wii, Xbox 360 | 2011 |
| Champion Jockey Special | | Koei | Tecmo Koei | None | Horse racing | Nintendo Switch | 2017 |
| Ciel Nosurge | シェルノサージュ〜失われた星へ捧ぐ詩 | Gust | Tecmo Koei | Surge Concerto | Life simulation | PlayStation Vita | 2012 |
| Crimson Sea | 紅の海 | Koei | Koei | Crimson Sea | Third-person shooter | Xbox | 2002 |
| Crimson Sea 2 | 紅の海2 | Koei | Koei | Crimson Sea | Third-person shooter | PlayStation 2 | 2004 |
| Croc: Legend of the Gobbos | | Argonaut Games | Koei | Croc | Platform | PlayStation | 1997 |
| Croc 2 | | Argonaut Games | Koei | Croc | Platform | PlayStation | 1999 |
| Colosseum: Road to Freedom | | GOSHOW/Ertain | Koei | None | Hack and slash | PlayStation 2 | 2005 |
| Daikoukai Jidai III: Costa del Sol | 大航海時代III | Koei | Koei | Uncharted Waters | Historical role-playing | Microsoft Windows | 1996 |
| Daikoukai Jidai IV: Porto Estado | 大航海時代IV | Koei | Koei | Uncharted Waters | Historical role-playing | PlayStation, Microsoft Windows, PlayStation Portable, Nintendo DS, mobile phones | 1999 |
| Daikoukai Jidai V: Road to Zipang | 大航海時代V | Koei | Koei | Uncharted Waters | Historical role-playing | Microsoft Windows | 2014 |
| Daikoukai Jidai Gaiden | 大航海時代 Gaiden | Koei | Koei | Uncharted Waters | Historical role-playing | PlayStation, Sega Saturn | 1997 |
| Danchi Zuma no Yuuwaku | 団地妻の誘惑 | Koei | Koei | None | Erotic simulation | FM-7, FM-8, MSX, PC-8801, PC-9801, Sharp X1 | 1983 |
| Dead or Alive | デッド オア アライブ | Team Ninja | Tecmo | Dead or Alive | Fighting | Arcade, Sega Saturn, PlayStation | 1996 |
| Dead or Alive 2 | デッド オア アライブ2 | Team Ninja | Tecmo | Dead or Alive | Fighting | Arcade, Dreamcast, PlayStation 2 | 1999 |
| Dead or Alive 3 | デッド オア アライブ3 | Team Ninja | Tecmo | Dead or Alive | Fighting | Xbox | 2001 |
| Dead or Alive 4 | デッド オア アライブ4 | Team Ninja | Tecmo | Dead or Alive | Fighting | Xbox 360 | 2005 |
| Dead or Alive 5 | デッド オア アライブ5 | Team Ninja | Tecmo | Dead or Alive | Fighting | PlayStation 3, Xbox 360, PlayStation Vita | 2012 |
| Dead or Alive 5 Last Round | デッド オア アライブLast Round | Team Ninja | Koei Tecmo | Dead or Alive | Fighting | PlayStation 3, PlayStation 4, Xbox 360, Xbox One, Microsoft Windows, Arcade | 2015 |
| Dead or Alive 5 Ultimate | デッド オア アライブ5 ULTIMATE | Team Ninja | Tecmo | Dead or Alive | Fighting | PlayStation 3, Xbox 360 | 2013 |
| Dead or Alive 6 | デッド オア アライブ6 | Team Ninja | Tecmo | Dead or Alive | Fighting | PlayStation 4, Xbox One, Microsoft Windows | 2019 |
| Dead or Alive: Code Chronos | | Team Ninja | Tecmo Koei | Dead or Alive | Fighting | Xbox 360 | Cancelled |
| Dead or Alive: Dimensions | デッド オア アライブ ディメンションズ | Team Ninja | Tecmo Koei | Dead or Alive | Fighting | Nintendo 3DS | 2011 |
| Dead or Alive Online | 生死格鬥 | Team Ninja | Tecmo | Dead or Alive | Fighting | Microsoft Windows | 2008 |
| Dead or Alive Paradise | デッド オア アライブ Paradise | Team Ninja | Tecmo | Dead or Alive | Fighting | PlayStation Portable | 2010 |
| Dead or Alive Ultimate | デッド オア アライブULTIMATE | Team Ninja | Tecmo | Dead or Alive | Fighting | Xbox | 2004 |
| Dead or Alive Xtreme Beach Volleyball | デッド オア アライブ XTREME BEACH VOLLEYBALL | Team Ninja | Tecmo | Dead or Alive | Fighting | Xbox | 2003 |
| Dead or Alive Xtreme 2 | デッド オア アライブ XTREME 2 | Team Ninja | Tecmo | Dead or Alive | Fighting | Xbox 360 | 2006 |
| Dead or Alive Xtreme 3 | デッド オア アライブ XTREME 3 | Team Ninja | Koei Tecmo | Dead or Alive | Fighting | PlayStation 4, PlayStation Vita | 2016 |
| Deception III: Dark Delusion | 蒼魔灯 | Tecmo | Tecmo | Deception | Strategy-RPG | PlayStation | 1999 |
| Deception IV: Blood Ties | 影牢 ダークサイド・プリンセス | Tecmo | Tecmo | Deception | Strategy-RPG | PlayStation Vita, PlayStation 3 | 2014 |
| Deception IV: The Nightmare Princess | 影牢 ～もう1人のプリンセス | Tecmo | Tecmo | Deception | Strategy-RPG | PlayStation Vita, PlayStation 3, PlayStation 4 | 2015 |
| Derby Musou | ダービー無双 | Tecmo | Tecmo | Samurai Warriors | Hack and slash | Microsoft Windows | 2014 |
| Destrega | デストレーガ | Omega Force | Koei | None | Fighting | PlayStation | 1998 |
| Disgaea: Hour of Darkness | 魔界戦記ディスガイア | Nippon Ichi Software | Koei | Disgaea | Tactical role-playing | PlayStation 2 | 2004 |
| Disgaea 2: Cursed Memories | 魔界戦記ディスガイア2 | Nippon Ichi Software | Koei | Disgaea | Tactical role-playing | PlayStation 2 | 2006 |
| Dissidia Final Fantasy NT | ディシディア ファイナルファンタジー NT | Team Ninja | Square Enix | Final Fantasy | Fighting | PlayStation 4 | 2018 |
| Dokodemo Rasshou! Pachislo Sengen | | Tecmo | Tecmo | Rakushou! Pachi-Slot Sengen | Slot machine simulation | PlayStation Portable | 2005 |
| Dynasty Kingdoms | | Koei | Koei | Romance of the Three Kingdoms | Card | iOS | 2013 |
| Dynasty Tactics | 三國志戦記 | Koei | Koei | Romance of the Three Kingdoms | Tactical role-playing game | PlayStation 2 | 2002 |
| Dynasty Tactics 2 | 三國志戦記2 | Koei | Koei | Romance of the Three Kingdoms | Tactical role-playing game | PlayStation 2 | 2003 |
| Dynasty Warriors | 三國無双 | Omega Force | Koei | Dynasty Warriors | Fighting | PlayStation | 1997 |
| Dynasty Warriors | 真・三國無双 | Omega Force | Koei | Dynasty Warriors | Hack and slash | PlayStation Portable | 2004 |
| Dynasty Warriors 2 | 真・三國無双 | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 2 | 2000 |
| Dynasty Warriors 3 | 真・三國無双2 | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 2, Xbox | 2001 |
| Dynasty Warriors 3: Xtreme Legends | 真・三國無双2 猛将伝 | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 2 | 2002 |
| Dynasty Warriors 4 | 真・三國無双3 | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 2, Xbox | 2003 |
| Dynasty Warriors 4: Empires | 真・三國無双3 Empires | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 2 | 2004 |
| Dynasty Warriors 4 Hyper | 真・三國無双3 ハイパー | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | Microsoft Windows | 2005 |
| Dynasty Warriors 4: Xtreme Legends | 真・三國無双3 猛将伝 | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 2 | 2003 |
| Dynasty Warriors 5 | 真・三國無双4 | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 2, Xbox | 2005 |
| Dynasty Warriors 5: Empires | 真・三國無双4 Empires | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 2, Xbox 360 | 2006 |
| Dynasty Warriors 5 Special | 真・三國無双4 Special | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | Xbox 360, Microsoft Windows | 2005 |
| Dynasty Warriors 5: Xtreme Legends | 真・三國無双4 猛将伝 | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 2 | 2005 |
| Dynasty Warriors 6 | 真・三國無双5 | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 2, Xbox 360, Microsoft Windows | 2007 |
| Dynasty Warriors 6: Empires | 真・三國無双5 Empires | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 3, PlayStation Portable, Xbox 360 | 2009 |
| Dynasty Warriors 6 Special | 真・三國無双5 Special | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 2 | 2008 |
| Dynasty Warriors 7 | 真・三國無双6 | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 3, Xbox 360 | 2011 |
| Dynasty Warriors 8 | 真・三國無双7 | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 3, Xbox 360, Microsoft Windows | 2013 |
| Dynasty Warriors 8: Empires | 真・三國無双7 Empires | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 3, PlayStation 4, Xbox One, Microsoft Windows, Nintendo Switch | 2014 |
| Dynasty Warriors 8: Xtreme Legends | 真・三國無双7 猛将伝 | Omega Force | Koei | Dynasty Warriors | Hack and slash, tactical action | PlayStation 3, PlayStation 4, Microsoft Windows | 2013 |
| Dynasty Warriors 9 | 真・三國無双8 | Omega Force | Koei Tecmo | Dynasty Warriors | Hack and slash, tactical action | PlayStation 4, Xbox One, Microsoft Windows | 2018 |
| Dynasty Warriors 9 Empires | 真・三國無双8 Empires | Omega Force | Koei Tecmo | Dynasty Warriors | Hack and slash, tactical action | PlayStation 4, Xbox One, Microsoft Windows, Nintendo Switch | 2022 |
| Dynasty Warriors Advance | 真・三國無双 ADVANCE | Omega Force | JP: Koei WW: Nintendo | Dynasty Warriors | Hack and slash, tactical action | Game Boy Advance | 2005 |
| Dynasty Warriors DS: Fighter's Battle | 真・三國無双 DS ファイターズバトル | Omega Force | Koei | Dynasty Warriors | Tactical action | Nintendo DS | 2007 |
| Dynasty Warriors: Godseekers | 真・三國無双 英傑伝 | Omega Force | Koei Tecmo | Dynasty Warriors | Role-playing | PlayStation 3, PlayStation 4, PlayStation Vita | 2016 |
| Dynasty Warriors: Gundam | ガンダム無双 | Omega Force | Koei | Dynasty Warriors Gundam | Action role-playing, hack and slash | PlayStation 3, Xbox 360 | 2007 |
| Dynasty Warriors: Gundam 2 | ガンダム無双2 | Omega Force | Koei | Dynasty Warriors Gundam | Action role-playing, hack and slash | PlayStation 2, PlayStation 3, Xbox 360 | 2008 |
| Dynasty Warriors: Gundam 3 | ガンダム無双3 | Omega Force | Koei | Dynasty Warriors Gundam | Action role-playing, hack and slash | PlayStation 3, Xbox 360 | 2010 |
| Dynasty Warriors: Gundam Reborn | 真・ガンダム無双 | Koei/Omega Force | Bandai Namco Entertainment | Dynasty Warriors Gundam | Action role-playing, hack and slash | PlayStation 3, PlayStation Vita | 2013 |
| Dynasty Warriors: Gundam Special | ガンダム無双 Special | Omega Force | Koei | Dynasty Warriors Gundam | Action role-playing, hack and slash | PlayStation 2 | 2008 |
| Dynasty Warriors Mahjong | 雀・三國無双 | Omega Force | Koei | Dynasty Warriors | Board | PlayStation 2, PlayStation Portable, Nintendo DS | 2006 |
| Dynasty Warriors Next | 真・三國無双 NEXT | Omega Force | Koei | Dynasty Warriors | Hack and slash | PlayStation Vita | 2011 |
| Dynasty Warriors Online | 雀・三國無双 | Tecmo Koei | Tecmo Koei | Dynasty Warriors | MMOG | Microsoft Windows, PlayStation 3 | 2006 |
| Dynasty Warriors: Origins | 真・三國無双 Origins | Omega Force | Koei Tecmo | Dynasty Warriors | Action | PlayStation 5, Xbox Series X/S, Microsoft Windows | 2025 |
| Dynasty Warriors: Strikeforce | 真・三國無双 Multi Raid | Omega Force | Koei | Dynasty Warriors | Hack and slash | PlayStation Portable, PlayStation 3, Xbox 360 | 2009 |
| Dynasty Warriors: Strikeforce 2 | 真・三國無双 Multi Raid 2 | Omega Force | Koei | Dynasty Warriors | Hack and slash | PlayStation Portable | 2010 |
| Dynasty Warriors: Unleashed | 真・三國無双 斬 | Nexon | Koei | Dynasty Warriors | Hack and slash | iOS, Android | 2017 |
| Dynasty Warriors Vol. 2 | 真・三國無双 2nd Evolution | Omega Force | Koei | Dynasty Warriors | Action role-playing, hack and slash | PlayStation Portable | 2006 |
| Fairy Tail | | Gust | Koei Tecmo | Fairy Tail | Role-playing | PlayStation 4, Nintendo Switch, Microsoft Windows | 2020 |
| Fairy Tail 2 | | Gust | Koei Tecmo | Fairy Tail | Role-playing | PlayStation 4, PlayStation 5, Nintendo Switch, Microsoft Windows | 2024 |
| Fatal Frame | 零 ～zero～ | Tecmo | Tecmo | Fatal Frame | Survival horror | PlayStation 2, Xbox | 2001 |
| Fatal Frame II: Crimson Butterfly | 零～紅い蝶～ | Tecmo | Tecmo | Fatal Frame | Survival horror | PlayStation 2 | 2003 |
| Fatal Frame II: Crimson Butterfly - Director's Cut | 零～紅い蝶～ | Tecmo | Tecmo | Fatal Frame | Survival horror | Xbox | 2004 |
| Fatal Frame III: The Tormented | 零～刺青の聲～ | Tecmo | Tecmo | Fatal Frame | Survival horror | PlayStation 2 | 2005 |
| Fatal Frame IV | 零～月蝕の仮面～ | Tecmo | Nintendo | Fatal Frame | Survival horror | Wii | 2008 |
| Spirit Camera: The Cursed Memoir | 心霊カメラ ～憑いてる手帳～ | Koei Tecmo | Nintendo | Fatal Frame | Survival horror | Nintendo 3DS | 2012 |
| Project Zero 2: Wii Edition | 零 〜眞紅の蝶〜 (Zero: Deep Crimson Butterfly) | Koei Tecmo | Nintendo | Fatal Frame | Survival horror | Wii | 2012 |
| Fatal Frame: Maiden of the Black Water | 零 ～濡鴉ノ巫女～ (Zero: Nuregarasu no Miko) | Koei Tecmo | Nintendo | Fatal Frame | Survival horror | Wii U | 2014 |
| Fatal Inertia | | Koei Canada | Koei | None | Racing | PlayStation 3, Xbox 360 | 2007 |
| Fate/Samurai Remnant | | Omega Force | Koei Tecmo | Fate/stay night | Hack and slash | Nintendo Switch, PlayStation 4, PlayStation 5, Microsoft Windows | 2023 |
| Final Star Force | ファイナルスターフォース | Tecmo | Tecmo | None | Shoot 'em up | Arcade | 1992 |
| Fire 'n Ice | | Tecmo | Tecmo | Solomon's Key | Puzzle | NES, Nintendo Switch | 1993 |
| Fire Emblem Warriors | ファイアーエムブレム無双 | Omega Force, Team Ninja | JP: Koei Tecmo WW: Nintendo | Fire Emblem Warriors | Hack and slash | Nintendo Switch, New Nintendo 3DS | 2017 |
| Fire Emblem: Three Houses | ファイアーエムブレム 風花雪月 | Intelligent Systems, Koei Tecmo | Nintendo | Fire Emblem | Tactical role-playing | Nintendo Switch | 2019 |
| Fire Emblem Warriors: Three Hopes | ファイアーエムブレム無双 風花雪月 | Omega Force, Team Ninja | JP: Koei Tecmo WW: Nintendo | Fire Emblem Warriors | Hack and slash | Nintendo Switch | 2022 |
| Fist of the North Star: Ken's Rage | 北斗無双 (Hokuto Musō) | Omega Force | Tecmo Koei | Fist of the North Star | Beat 'em up | PlayStation 3, Xbox 360 | 2010 |
| Fist of the North Star: Ken's Rage 2 | 真・北斗無双 (Shin Hokuto Musō) | Koei | Tecmo Koei | Fist of the North Star | Beat 'em up | PlayStation 3, Xbox 360, Wii U | 2012 |
| G1 Jockey | | Koei | Koei | G1 Jockey | Horse racing simulation | PlayStation 2 | 2001 |
| G1 Jockey 2 | | Koei | Koei | G1 Jockey | Horse racing simulation | PlayStation 2 | 2001 |
| G1 Jockey 3 | | Koei | Koei | G1 Jockey | Horse racing simulation | PlayStation 2 | 2003 |
| G1 Jockey 4 | | Koei | Koei | G1 Jockey | Horse racing simulation | PlayStation 2 | 2005 |
| G1 Jockey 4 2007 | | Koei | Koei | G1 Jockey | Horse racing simulation | PlayStation 2, PlayStation 3 | 2007 |
| Gallop Racer | ギャロップレーサー | Tecmo | Tecmo | Gallop Racer | Horse racing simulation | PlayStation | 1996 |
| Gallop Racer 2 | ギャロップレーサー2 -ONE AND ONLY ROAD TO VICTORY- | Tecmo | Tecmo | Gallop Racer | Horse racing simulation | PlayStation | 1997 |
| Gallop Racer 2000 | ギャロップレーサー2000 | Tecmo | Tecmo | Gallop Racer | Horse racing simulation | PlayStation | 2000 |
| Gallop Racer 2001 | ギャロップレーサー2001 | Tecmo | Tecmo | Gallop Racer | Horse racing simulation | PlayStation 2 | 2001 |
| Gallop Racer 2003: A New Breed | ギャロップレーサー2003 | Tecmo | Tecmo | Gallop Racer | Horse racing simulation | PlayStation 2 | 2002 |
| Gallop Racer 2004 | ギャロップレーサー2004 | Tecmo | Tecmo | Gallop Racer | Horse racing simulation | PlayStation 2 | 2004 |
| Gallop Racer 2006 | ギャロップレーサー2006 | Tecmo | Tecmo | Gallop Racer | Horse racing simulation | PlayStation 2 | 2006 |
| Gemfire | アクタリオン | Koei | Koei | None | Medieval fantasy simulation | MSX, NES, Super NES, Mega Drive/Genesis, MS-DOS, NEC PC-9801, FM Towns, Sharp X68000, NEC PC-8801, Microsoft Windows | 1991 |
| Genghis Khan | 蒼き狼と白き牝鹿・ジンギスカン | Koei | Koei | Aoki Ōkami to Shiroki Mejika | Historical turn-based strategy | MSX, NES, Amiga, MS-DOS | 1987 |
| Genghis Khan II: Clan of the Gray Wolf | 蒼き狼と白き牝鹿・元朝秘史 | Koei | Koei | Aoki Ōkami to Shiroki Mejika | Historical turn-based strategy | PC-88, PC-98, MSX2, X68000, SNES, Mega Drive, MS-DOS | 1992 |
| Genghis Khan: Aoki Ookami to Shiroki Mejika IV | チンギスハーン・蒼き狼と白き牝鹿IV | Koei | Koei | Aoki Ōkami to Shiroki Mejika | Historical turn-based strategy | Microsoft Windows, PlayStation | 1998 |
| Geten no Hana | 下天の華 | Ruby Party | Koei | None | Dating sim | PlayStation Portable, PlayStation Vita | 2013 |
| The Girls of Dead or Alive: Blackjack | | Team Ninja | Tecmo | Dead or Alive | Mobile | iOS | 2009 |
| Gitaroo Man | ギタルマン | iNiS/Koei | Koei | Gitaroo Man | Rhythm/music game | PlayStation 2, PlayStation Portable | 2001 |
| Gitaroo Man Lives! | ギタルマン ライブ | iNiS/Koei | Koei | Gitaroo Man | Rhythm/music game | PlayStation Portable | 2006 |
| GunGriffon: Allied Strike | | Game Arts | Tecmo | GunGriffon | Mech sim | Xbox | 2004 |
| Guzzler | | Tehkan | Tehkan | None | maze | Arcade | 1983 |
| Harukanaru Toki no Naka de | 遙かなる時空の中で (From a Faraway Time) | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation | 2000 |
| Harukanaru Toki no Naka de 2 | 遙かなる時空の中で2 | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation 2 | 2001 |
| Harukanaru Toki no Naka de 3 | 遙かなる時空の中で3 | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation 2 | 2004 |
| Harukanaru Toki no Naka de 3 izayoiki | 遙かなる時空の中で3 十六夜記 | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation 2 | 2005 |
| Harukanaru Toki no Naka de 3 unmei no rabirinsu | 遙かなる時空の中で3 運命の迷宮 | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation 2 | 2006 |
| Harukanaru Toki no Naka de 4 | 遙かなる時空の中で4 | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation 2 | 2008 |
| Harukanaru Toki no Naka de 5 | 遙かなる時空の中で5 | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation 2 | 2011 |
| Harukanaru Toki no Naka de 5 kazahanaki | 遙かなる時空の中で5 風花記 | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation 2 | 2012 |
| Harukanaru Toki no Naka de 6 | 遙かなる時空の中で6 | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation Portable, PlayStation Vita | 2015 |
| Harukanaru Toki no Naka de Banjo Yugi | 遙かなる時空の中で 盤上遊戯 | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation | 2003 |
| Harukanaru Toki no Naka de Hachiyosho | 遙かなる時空の中で ～八葉抄～ | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation 2 | 2005 |
| Harukanaru Toki no Naka de Hisutori | 遙かなる時空の中で ヒストリー | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation 2 | 2005 |
| Harukanaru Toki no Naka de Maihitoyo | 遙かなる時空の中で 舞一夜 | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation 2 | 2006 |
| Harukanaru Toki no Naka de Yume no Ukihashi | 遙かなる時空の中で 夢浮橋 | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | Nintendo DS | 2008 |
| Harukanaru Toki no Naka de Yume no Ukihashi Special | 遙かなる時空の中で 夢浮橋 Special | Ruby Party | Koei | Harukanaru Toki no Naka de | Otome adventure | PlayStation 2 | 2009 |
| Head On | | Sega | Tecmo | None | Driving, maze | Arcade | 1979 |
| Heir of Zendor | | Koei | Koei | None | Strategy | Sega Saturn | 1997 |
| Hermina and Culus: Atelier Lilie Another Story | ヘルミーナとクルス 〜リリーのアトリエ もう一つの物語〜 | Gust | Koei | Atelier | Role-playing | PlayStation 2 | 2001 |
| Hyakuman-nin no Nobunaga no Yabō | 100万人の信長の野望 | Mobage | Koei | Nobunaga's Ambition | Grand strategy | Microsoft Windows | 2010 |
| Nobunaga's Ambition: Nyapuri! | | Koei Tecmo | Koei Tecmo | Nobunaga's Ambition | Grand strategy | iOS, Android | 2018 |
| Hyrule Warriors | ゼルダ無双 | Omega Force, Team Ninja | Koei Tecmo | The Legend of Zelda Dynasty Warriors | Action, hack and slash | Wii U | 2014 |
| Hyrule Warriors Legends | ゼルダ無双 ハイラルオールスターズ | Omega Force, Team Ninja | Koei Tecmo | The Legend of Zelda Dynasty Warriors | Action, hack and slash | Nintendo 3DS | 2016 |
| Hyrule Warriors: Definitive Edition | ゼルダ無双 ハイラルオールスターズ DX | Omega Force, Team Ninja | Koei Tecmo | The Legend of Zelda Dynasty Warriors | Action, hack and slash | Nintendo Switch | 2018 |
| Hyrule Warriors: Age of Calamity | ゼルダ無双 厄災の黙示録 | Omega Force | JP: Koei Tecmo WW: Nintendo | The Legend of Zelda Dynasty Warriors | Action, hack and slash | Nintendo Switch | 2020 |
| Inindo: Way of the Ninja | 伊忍道 打倒信長 | Koei | Koei | Rekoeition | Historical role-playing | PC-8801SR, PC-9801, MSX2, FM Towns, Sharp X68000, MS-DOS (Chinese), SNES, Windows 98 | 1991 |
| Ishin no Arashi | 維新の嵐 | Koei | Koei | Ishin no Arashi | Historical role-playing | PC-8801, PC-9801, NES, Sega Saturn, PlayStation, X68000, MSX, FM-7, FM Towns, X1 | 1988 |
| Ishin no Arashi Bakumatsu Shishiden | 維新の嵐 幕末志士伝 | Koei | Koei | Ishin no Arashi | Historical role-playing | Microsoft Windows, PlayStation, mobile phones | 1998 |
| Ishin no Arashi Shippuu Ryoumaden | 維新の嵐 疾風龍馬伝 | Koei | Koei | Ishin no Arashi | Historical role-playing | Nintendo DS | 2010 |
| J League Go Go Goal! | Jリーグ ゴーゴーゴール！ | Tecmo | Tecmo | None | Sports | Sega Saturn | 1997 |
| Kagero: Deception II | 影牢～刻命館真章～ | Tecmo | Tecmo | Deception | Strategy-RPG | PlayStation | 1998 |
| Kamigami no Daichi Kojiki Gaiden | | Koei | Koei | Rekoeition | Historical role-playing | FM Towns, PC-9801 | 1993 |
| Kessen | 決戦 | Koei | Koei | Kessen | Historical RTS | PlayStation 2 | 2000 |
| Kessen II | 決戦 II | Koei | Koei | Kessen | Historical RTS | PlayStation 2 | 2001 |
| Kessen III | 決戦III | Koei | Koei | Kessen | Historical RTS | PlayStation 2 | 2004 |
| Kin'iro no Corda | 金色のコルダ, lit. Golden Corda | Ruby Party | Koei | Kin'iro no Corda | Dating sim | Microsoft Windows, PlayStation 2, PlayStation Portable | 2003 |
| Kin'iro no Corda 2 | 金色のコルダ2 | Ruby Party | Koei | Kin'iro no Corda | Dating sim | PlayStation 2 | 2007 |
| Kin'iro no Corda 2 encore | 金色のコルダ2 アンコール | Ruby Party | Koei | Kin'iro no Corda | Dating sim | PlayStation 2 | 2007 |
| Kin'iro no Corda 2 f | 金色のコルダ2 f | Ruby Party | Koei | Kin'iro no Corda | Dating sim | PlayStation Portable | 2009 |
| Kin'iro no Corda 2 f encore | 金色のコルダ2 f アンコール | Ruby Party | Koei | Kin'iro no Corda | Dating sim | PlayStation Portable | 2009 |
| Kin'iro no Corda 3 | 金色のコルダ3 | Ruby Party | Koei | Kin'iro no Corda | Dating sim | PlayStation 2, PlayStation Portable, mobile phones | 2010 |
| Kin'iro no Corda 3 AnotherSky feat. Amane Gakuen | 金色のコルダ3 AnotherSky feat. Amane Gakuen | Ruby Party | Koei | Kin'iro no Corda | Dating sim | PlayStation Portable, PlayStation Vita | 2014 |
| Kin'iro no Corda 3 AnotherSky feat. Jinnan | 金色のコルダ3 AnotherSky feat. Jinnan | Ruby Party | Koei | Kin'iro no Corda | Dating sim | PlayStation Portable, PlayStation Vita | 2014 |
| Kin'iro no Corda 3 AnotherSky feat. Shiseikan | 金色のコルダ3 AnotherSky feat. Shiseikan | Ruby Party | Koei | Kin'iro no Corda | Dating sim | PlayStation Portable, PlayStation Vita | 2014 |
| Kin'iro no Corda 3: Full Voice Special | 金色のコルダ3フルボイスSpecial | Ruby Party | Koei | Kin'iro no Corda | Dating sim | PlayStation Portable, Nintendo 3DS, PlayStation Vita | 2013 |
| Kin'iro no Corda 4 | 金色のコルダ4 | Ruby Party | Koei | Kin'iro no Corda | Dating sim | PlayStation Vita | 2016 |
| Kin'iro no Corda Octave | 金色のコルダ オクターヴ | Ruby Party | Koei | Kin'iro no Corda | Dating sim | Mobile phones | 2017 |
| Kurogane no Houkou: Warship Commander | 鋼鉄の咆哮 ウォーシップコマンダー | Microcabin | Koei | Kurogane no Houkou | Vehicle simulation | PlayStation 2, Microsoft Windows | 2001 |
| La Pucelle: Tactics | ラ・ピュセル 光の聖女伝説 | Nippon Ichi Software | Koei | None | Tactical role-playing | PlayStation 2, PlayStation Portable | 2005 |
| Leading Company | リーディングカンパニー | Koei | Koei | Koei Executive | Business simulation | FM Towns, NEC PC-9801, Sharp X68000, Super Famicom | 1993 |
| L'Empereur | ランペルール | Koei | Koei | None | Historical strategy | NES | 1991 |
| Liberty or Death | | Koei | Koei | Historical Simulation | Historical turn-based strategy | MS-DOS, Super NES, Genesis/Mega Drive | 1994 |
| LoveφSummit | ラブφサミット | Ruby Party | Koei/CWS Brains | Neoromance | Visual novel | Mobile phones | 2009 |
| Makai Kingdom: Chronicles of the Sacred Tome | Phantom Kingdom (ファントム・キングダム, Fantomu Kingudamu) | Nippon Ichi Software | Nippon Ichi Software/Koei | Disgaea | Tactical RPG | PlayStation 2, PlayStation Portable | 2005 |
| Marvel Ultimate Alliance 3: The Black Order | | Team Ninja | Nintendo | Marvel Ultimate Alliance | Action-adventure | Nintendo Switch | 2019 |
| Metroid: Other M | | Team Ninja/Nintendo | Nintendo | Metroid | Action-adventure | Wii | 2010 |
| Mighty Bomb Jack | | Tecmo | Tecmo | Bomb Jack | Platform | Arcade | 1987 |
| MISS PRINCESS: Miss Puri! | MISS PRINCESS ミスプリ! | Ruby Party | Koei | Neoromance | Dating sim | Nintendo DS | 2011 |
| Mobile Shin Sangokumusō | | Koei | Koei | Dynasty Warriors | Mobile | Mobile phones | 2008 |
| Monster Rancher | モンスターファーム | Tecmo | Tecmo | Monster Rancher | Life simulation | PlayStation | 1997 |
| Monster Rancher 2 | モンスターファーム2 | Tecmo | Tecmo | Monster Rancher | Life simulation | PlayStation | 1999 |
| Monster Rancher 3 | モンスターファーム3 | Tecmo | Tecmo | Monster Rancher | Life simulation | PlayStation 2 | 2001 |
| Monster Rancher 4 | モンスターファーム4 | Tecmo | Tecmo | Monster Rancher | Life simulation | PlayStation 2 | 2003 |
| Monster Rancher Advance | モンスターファームアドバンス | Tecmo | Tecmo | Monster Rancher | Life simulation | Game Boy Advance | 2001 |
| Monster Rancher Advance 2 | モンスターファームアドバンス2 | Tecmo | Tecmo | Monster Rancher | Life simulation | Game Boy Advance | 2002 |
| Monster Rancher Battle Card Game | モンスターファームバトルカードGB | GRC | Tecmo | Monster Rancher | Strategy | Game Boy Color | 1999 |
| Monster Rancher Battle Card: Episode II | モンスターファームバトルカード | GRC | Tecmo | Monster Rancher | Strategy | Game Boy Color | 2000 |
| Monster Rancher DS | モンスターファームDS2 甦る!マスターブリーダー伝説! | Cing | Tecmo | Monster Rancher | Life simulation | Nintendo DS | 2008 |
| Monster Rancher EVO | モンスターファーム5 サーカスキャラバン | Tecmo | Tecmo | Monster Rancher | Life simulation | PlayStation 2 | 2005 |
| Monster Rancher Explorer | ソロモン | Tecmo | Tecmo | Solomon's Key Monster Rancher | Puzzle | Game Boy Color | 2000 |
| Monster Rancher Hop-A-Bout | モンスターファームジャンプ | Tecmo | Tecmo | Monster Rancher | Life simulation | PlayStation | 2000 |
| Monster Rancher POP | モンスターファームPOP | Tecmo | Tecmo | Monster Rancher | Life simulation | Mobile phones | 2004 |
| Monster Rancher POP 2 | モンスターファームPOP2 | Tecmo | Tecmo | Monster Rancher | Life simulation | Mobile phones | 2004 |
| Mouri Motonari: Chikai no Sanshi | 毛利元就 誓いの三矢 | Koei | Koei | Eiketsuden | Tactical role-playing | Microsoft Windows, Sega Saturn, PlayStation | 1997 |
| Musou Orochi Z | 無双オロチ Z | Omega Force | Koei | Warriors | Beat 'em up | PlayStation 3, Microsoft Windows | 2009 |
| Mystic Heroes | バトル封神 | Koei | Koei | None | Beat 'em up | GameCube, PlayStation 2 | 2002 |
| Naval Ops: Commander | 鋼鉄の咆哮2 ウォーシップコマンダー | Microcabin | Koei | Kurogane no Houkou | Vehicle simulation | PlayStation 2, Microsoft Windows | 2002 |
| Naval Ops: Warship Gunner | 鋼鉄の咆哮2 ウォーシップガンナー | Microcabin | Koei | Kurogane no Houkou | Vehicle simulation | PlayStation 2 | 2003 |
| Naval Ops: Warship Gunner 2 | ウォーシップガンナー2 鋼鉄の咆哮 | Koei | Koei | Kurogane no Houkou | Vehicle simulation | PlayStation 2, PlayStation Portable | 2006 |
| NBA Unrivaled | NBAアンラ​​イバルド | A.C.R.O.N.Y.M. Games | Tecmo | None | Sports simulation | Xbox 360, PlayStation 3 | 2009 |
| Nelke & the Legendary Alchemists: Ateliers of the New World | ネルケと伝説の錬金術士たち ～新たな大地のアトリエ～ | Gust | Koei Tecmo | Atelier | Role-playing | Microsoft Windows, PlayStation 4, PlayStation Vita, PlayStation TV, Nintendo Switch | 2019 |
| Neo Angelique ~Abyss~ | ネオアンジェリーク | Ruby Party | Koei | Angelique Neoromance | Dating sim | PlayStation 2 | 2008 |
| Nights of Azure | よるのないくに (Yoru no Nai Kuni) | Gust | Koei Tecmo | Nights of Azure | Action role-playing | PlayStation 3, PlayStation 4, PlayStation Vita, Microsoft Windows | 2015 |
| Nights of Azure 2: Bride of the New Moon | よるのないくに2 | Gust | Koei Tecmo | Nights of Azure | Action role-playing | PlayStation 3, PlayStation 4, PlayStation Vita, Microsoft Windows, Nintendo Switch | 2017 |
| Night Life | ナイトライフ | Koei | Koei | None | Eroge | NEC PC-8801 | 1982 |
| Ninja Gaiden (2004 video game) | NINJA GAIDEN | Team Ninja | Tecmo | Ninja Gaiden | Action-adventure, hack and slash | Xbox | 2004 |
| Ninja Gaiden (arcade game) | 忍者龍剣伝 | Tecmo | Tecmo | Ninja Gaiden | Beat 'em up | Arcade | 1988 |
| Ninja Gaiden (NES video game) | 忍者龍剣伝 | Tecmo | Tecmo | Ninja Gaiden | Platform | NES | 1989 |
| Ninja Gaiden II | NINJA GAIDEN 2 | Team Ninja | Microsoft Game Studios | Ninja Gaiden | Action-adventure, hack and slash | Xbox 360 | 2008 |
| Ninja Gaiden II: The Dark Sword of Chaos | 忍者龍剣伝II 暗黒の邪神剣 | Tecmo | Tecmo | Ninja Gaiden | Platform | NES | 1990 |
| Ninja Gaiden II: Black | NINJA GAIDEN 2 Black | Team Ninja | Koei Tecmo | Ninja Gaiden | Action-adventure, Platform | Microsoft Windows, PlayStation 5, Xbox Series | 2025 |
| Ninja Gaiden III: The Ancient Ship of Doom | 忍者龍剣伝III 黄泉の方船 | Tecmo | Tecmo | Ninja Gaiden | Platform | NES | 1991 |
| Ninja Gaiden 3 | NINJA GAIDEN 3 | Team Ninja | Tecmo | Ninja Gaiden | Action-adventure, hack and slash | PlayStation 3, Xbox 360 | 2012 |
| Ninja Gaiden 3: Razor's Edge | NINJA GAIDEN 3 Razor's Edge | Team Ninja | Tecmo Koei | Ninja Gaiden | Action-adventure, hack and slash | Wii U, PlayStation 3, Xbox 360 | 2012 |
| Ninja Gaiden 3DS | NINJA GAIDEN 3DS | Team Ninja | Tecmo Koei | Ninja Gaiden | Action-adventure, hack and slash | Nintendo 3DS | Cancelled |
| Ninja Gaiden 4 | NINJA GAIDEN 4 | Team Ninja, PlatinumGames | Xbox Game Studios | Ninja Gaiden | Action-adventure, Platform | Microsoft Windows, PlayStation 5, Xbox Series | 2025 |
| Ninja Gaiden Black | NINJA GAIDEN Black | Team Ninja | Tecmo | Ninja Gaiden | Action-adventure, hack and slash | Xbox | 2005 |
| Ninja Gaiden Dragon Sword | NINJA GAIDEN Dragon Sword | Team Ninja | Tecmo | Ninja Gaiden | Action-adventure | Nintendo DS | 2008 |
| Ninja Gaiden Episode 1: Destiny | | Tecmo | Tecmo | Ninja Gaiden | Platform | Mobile phones | 2004 |
| Ninja Gaiden Hurricane Pack: Volume I | | Team Ninja | Tecmo | Ninja Gaiden | Action-adventure, hack and slash | Xbox | 2004 |
| Ninja Gaiden: Hurricane Pack Vol. 2 | | Team Ninja | Tecmo | Ninja Gaiden | Action-adventure, hack and slash | Xbox | 2004 |
| Ninja Gaiden: Master Collection | NINJA GAIDEN Master Collection | Team Ninja | Koei Tecmo | Ninja Gaiden | Action-adventure, Hack and slash | PlayStation 4, Nintendo Switch, Xbox One, Microsoft Windows | 2021 |
| Ninja Gaiden Ragebound | NINJA GAIDEN RAGEBOUND | Dotemu, The Game Kitchen | Koei Tecmo | Ninja Gaiden | Action-adventure, Platform | PlayStation 5, PlayStation 4, Nintendo Switch, Xbox Series X/S, Microsoft Windows | 2025 |
| Ninja Gaiden Shadow | 忍者龍剣伝GB 摩天楼決戦 | Tecmo/Natsume | Tecmo | Ninja Gaiden | Action | Game Boy | 1991 |
| Ninja Gaiden Sigma | NINJA GAIDEN Σ | Team Ninja | Tecmo | Ninja Gaiden | Action-adventure, hack and slash | PlayStation 3 | 2007 |
| Ninja Gaiden Sigma 2 | NINJA GAIDEN Σ 2 | Team Ninja | Tecmo | Ninja Gaiden | Action-adventure, hack and slash | PlayStation 3, PlayStation Vita | 2009 |
| Ninja Gaiden Trilogy | 忍者龍剣伝 巴 | Tecmo | Tecmo | Ninja Gaiden | Platform | SNES | 1995 |
| Nioh | 仁王 | Team Ninja | Koei Tecmo | Nioh | Action role-playing | PlayStation 4, Microsoft Windows | 2017 |
| Nioh 2 | 仁王2 | Team Ninja | Koei Tecmo | Nioh | Action role-playing | PlayStation 4, Microsoft Windows | 2020 |
| Nobunaga's Ambition | 信長の野望・全国版 | Koei | Koei | Nobunaga's Ambition | Grand strategy | PC-88SR, Family Computer, Super Famicom, Mega Drive, PC Engine Super CD-ROM², PlayStation, mobile phones, Microsoft Windows, iOS, Wii, Wii U | 1986 |
| Nobunaga's Ambition II | 信長の野望・全国版 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Family Computer, PlayStation, Sega Saturn, MS-DOS, mobile phones | 1988 |
| Nobunaga's Ambition: Lord of Darkness | 信長の野望・武将風雲録 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Family Computer, Super Famicom, Mega Drive, PC Engine Super CD-ROM², PlayStation, Microsoft Windows, Game Boy Advance, mobile phones | 1990 |
| Nobunaga no Yabō | 信長の野望 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Microsoft Windows, Sega Saturn, Game Boy, Game Boy Color, WonderSwan, PlayStation, Nintendo DS, Nintendo 3DS, mobile phones | 1983 |
| Nobunaga no Yabō: Haōden | 信長の野望・覇王伝 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Family Computer, Super Famicom, PlayStation, Microsoft Windows, Mega CD, 3DO, Mac OS, mobile phones | 1992 |
| Nobunaga no Yabō Internet | 信長の野望Internet | Koei | Koei | Nobunaga's Ambition | Grand strategy | Microsoft Windows | 1998 |
| Nobunaga no Yabō: Kakushin | 信長の野望・革新 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Microsoft Windows, PlayStation 2, Wii | 2005 |
| Nobunaga no Yabō Online | 信長の野望Online | Koei | Koei | Nobunaga's Ambition | Grand strategy | Microsoft Windows, PlayStation 2, PlayStation 3 | 2003 |
| Nobunaga no Yabō: Ranseiki | 信長の野望・嵐世記 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Microsoft Windows, PlayStation 2, Xbox | 2001 |
| Nobunaga no Yabō: Reppūden | 信長の野望・烈風伝 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Dreamcast, Microsoft Windows, PlayStation, PlayStation Portable, Macintosh, Nintendo DS, mobile phones | 1999 |
| Nobunaga no Yabō: Shōseiroku | 信長の野望・将星録 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Dreamcast, Sega Saturn, PlayStation, PlayStation Portable, Macintosh, mobile phones | 1997 |
| Nobunaga no Yabō: Sōtensoku | 信長の野望・蒼天録 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Microsoft Windows, PlayStation 2, PlayStation Portable | 2002 |
| Nobunaga's Ambition: Taishi | 信長の野望・大志 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Microsoft Windows, PlayStation 4, Nintendo Switch | 2017 |
| Nobunaga no Yabō: Tendō | 信長の野望・天道 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Microsoft Windows, PlayStation 3, Xbox 360 | 2009 |
| Nobunaga no Yabō: Tenka Sōsei | 信長の野望・天下創世 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Microsoft Windows, PlayStation 2 | 2003 |
| Nobunaga no Yabō: Tenshōki | 信長の野望・天翔記 | Koei | Koei | Nobunaga's Ambition | Grand strategy | PC-98, FM Towns, DOS/V, Super Famicom, Sega Saturn, PlayStation, PlayStation Portable, Macintosh, mobile phones | 1994 |
| Nobunaga's Ambition: Sphere of Influence | 信長の野望・創造 | Koei | Koei | Nobunaga's Ambition | Grand strategy | PlayStation 3, PlayStation 4, PlayStation Vita, Microsoft Windows, Nintendo Switch | 2013 |
| Oda Nobunaga Den | 織田信長伝 | Koei | Koei | Eiketsuden | Tactical role-playing | Microsoft Windows, PlayStation | 1998 |
| One Piece: Pirate Warriors | ワンピース 海賊無双 | Omega Force | Bandai Namco Games | One Piece | Action | PlayStation 3 | 2012 |
| One Piece: Pirate Warriors 2 | ワンピース 海賊無双 2 | Omega Force | Bandai Namco Games | One Piece | Action | PlayStation 3, PlayStation Vita | 2013 |
| One Piece: Pirate Warriors 3 | ワンピース 海賊無双 3 | Omega Force | Bandai Namco Games | One Piece | Action | PlayStation 3, PlayStation Vita, PlayStation 4, Microsoft Windows | 2015 |
| One Piece: Pirate Warriors 4 | ワンピース 海賊無双 4 | Omega Force | Bandai Namco Games | One Piece | Action | PlayStation 4, Microsoft Windows, Nintendo Switch, Xbox One | 2020 |
| Operation Europe: Path to Victory | ヨーロッパ戦線 | Koei | Koei | None | Turn-based strategy | FM Towns, MS-DOS, NEC PC-9801, Genesis, Super NES | 1993 |
| Opoona | オプーナ | ArtePiazza | Koei | None | Role-playing | Wii | 2007 |
| Oyaku de Asoberu DS Ehon: Ukkari Penelope | 親子で遊べるDS絵本 うっかりペネロペ | Tecmo | Tecmo | None | Visual novel | Nintendo DS | 2008 |
| Persona 5 Strikers | ペルソナ5 スクランブル ザ ファントム ストライカーズ | Omega Force, P-Studio | Atlus | Persona Dynasty Warriors | Hack and slash | Nintendo Switch, PlayStation 4, Microsoft Windows | 2020 |
| Pinball Action | | Tehkan | Tecmo | None | Pinball | Arcade | 1985 |
| Pleiads | プレアデス | Tehkan | Tehkan | None | Shoot 'em up | Arcade | 1981 |
| Phantom Brave | ファントム・ブレイブ | Nippon Ichi Software | Koei | None | Tactical role-playing | PlayStation 2, Wii, PlayStation Portable, Microsoft Windows | 2004 |
| Pokémon Conquest | ポケモン+ノブナガの野望 | Tecmo Koei | The Pokémon Company | Nobunaga's Ambition Pokémon | Role-playing | Nintendo DS | 2012 |
| Pop Cutie! Street Fashion Simulation | | Koei | Koei | None | Business simulation | Nintendo DS | 2008 |
| Prey the Stars | | Koei | Koei | None | Action | Nintendo DS | 2008 |
| Progenitor | | Koei | Koei | Rekoeition | Historical role-playing | PC-9801 | 1994 |
| Project Progressive | | Team Ninja | Tecmo | None | | Xbox 360 | Cancelled |
| P.T.O.: Pacific Theater of Operations | 提督の決断 | Koei | Koei | PTO | Strategy | Mega Drive, SNES | 1992 |
| P.T.O. II: Pacific Theater of Operations | 提督の決断II | Koei | Koei | PTO | Strategy | SNES | 1995 |
| P.T.O. IV: Pacific Theater of Operations | 提督の決断IV | Koei | Koei | PTO | Strategy | PlayStation 2, Microsoft Windows | 2002 |
| Quantum Theory | クウォンタム セオリー | Team Tachyon | Tecmo | None | Third-person shooter | PlayStation 3, Xbox 360 | 2010 |
| Radia Senki: Reimeihen | ラディア戦記 黎明篇 | Tecmo | Tecmo | None | Action role-playing | Family Computer | 1991 |
| Rasshou! Pachislo Sengen | | Tecmo | Tecmo | Rakushou! Pachi-Slot Sengen | Slot machine simulation | PlayStation 2 | 2003 |
| Rasshou! Pachislo Sengen 2: Dekadan | | Tecmo | Tecmo | Rakushou! Pachi-Slot Sengen | Slot machine simulation | PlayStation 2 | 2004 |
| Rasshou! Pachislo Sengen 3: Rio de Carnival, Juujika 600 Shiki | | Tecmo | Tecmo | Rakushou! Pachi-Slot Sengen | Slot machine simulation | PlayStation 2 | 2005 |
| Rasshou! Pachislo Sengen 4: Shin Mogu Mogu Fuurinkasan Rio de Carnival | | Tecmo | Tecmo | Rakushou! Pachi-Slot Sengen | Slot machine simulation | PlayStation 2 | 2006 |
| Rakushou! Pachi-Slot Sengen 5: Rio Paradise | | Tecmo | Tecmo | Rakushou! Pachi-Slot Sengen | Slot machine simulation | PlayStation 2 | 2007 |
| Rakushou! Pachi-Slot Sengen 6: Rio 2 Cruising Vanadis | | Tecmo | Tecmo | Rakushou! Pachi-Slot Sengen | Slot machine simulation | PlayStation 2 | 2007 |
| Real: Another Edition | | Tecmo | Tecmo | Fatal Frame | Survival horror | Mobile phones | 2004 |
| Right Brain Game | | Tecmo | Tecmo | None | Educational | Mobile phones | 2004 |
| Rise of the Phoenix | 項劉記 | Koei | Koei | None | Historical turn-based strategy | SNES, NEC PC-9801, FM Towns, X68000, PlayStation | 1993 |
| Rise of the Rōnin | | Team Ninja | Sony Interactive Entertainment | | | PlayStation 5 | 2024 |
| Romance of the Three Kingdoms | 三國志 | Koei | Koei | Romance of the Three Kingdoms | Historical turn-based strategy | Amiga, MSX, MSX2, NES, Microsoft Windows | 1985 |
| Romance of the Three Kingdoms 2 | | Koei | Koei | Romance of the Three Kingdoms | Strategy | iOS | 2010 |
| Romance of the Three Kingdoms II | 三國志II | Koei | Koei | Romance of the Three Kingdoms | Historical turn-based strategy | Amiga, MSX2, NES, SNES, Genesis, Microsoft Windows, Genesis, WonderSwan | 1989 |
| Romance of the Three Kingdoms III: Dragon of Destiny | 三國志III | Koei | Koei | Romance of the Three Kingdoms | Historical turn-based strategy | SNES, Genesis, Microsoft Windows | 1992 |
| Romance of the Three Kingdoms IV: Wall of Fire | 三國志IV | Koei | Koei | Romance of the Three Kingdoms | Historical turn-based strategy | SNES, Sega 32X, Sega Saturn, PlayStation, Microsoft Windows, Game Boy Advance | 1994 |
| Romance of the Three Kingdoms V | 三國志V | Koei | Koei | Romance of the Three Kingdoms | Historical turn-based strategy | Amiga, MSX2, NES, SNES, Genesis, Microsoft Windows, Genesis, WonderSwan | 1996 |
| Romance of the Three Kingdoms VI: Awakening of the Dragon | 三國志VI | Koei | Koei | Romance of the Three Kingdoms | Historical turn-based strategy | Dreamcast, PlayStation, Microsoft Windows | 1998 |
| Romance of the Three Kingdoms VII | 三國志VII | Koei | Koei | Romance of the Three Kingdoms | Historical turn-based strategy | PlayStation 2, Microsoft Windows | 2000 |
| Romance of the Three Kingdoms VIII | 三國志VIII | Koei | Koei | Romance of the Three Kingdoms | Historical turn-based strategy | PlayStation 2, Microsoft Windows | 2001 |
| Romance of the Three Kingdoms IX | 三國志IX | Koei | Koei | Romance of the Three Kingdoms | Historical turn-based strategy | PlayStation 2, Microsoft Windows | 2003 |
| Romance of the Three Kingdoms X | 三國志X | Koei | Koei | Romance of the Three Kingdoms | Historical turn-based strategy | PlayStation 2, Microsoft Windows | 2004 |
| Romance of the Three Kingdoms XI | 三國志XI | Koei | Koei | Romance of the Three Kingdoms | Historical turn-based strategy | PlayStation 2, Microsoft Windows, Wii | 2006 |
| Romance of the Three Kingdoms XII | 三國志XII | Koei | Koei | Romance of the Three Kingdoms | Historical turn-based strategy | PlayStation 3, Microsoft Windows, Wii U | 2012 |
| Romance of the Three Kingdoms XIII | 三國志XIII | Koei | Koei Tecmo | Romance of the Three Kingdoms | Historical turn-based strategy | PlayStation 3, PlayStation 4, Xbox One, Microsoft Windows | 2016 |
| Romance of the Three Kingdoms Touch | | Koei | Koei | Romance of the Three Kingdoms | Strategy | iOS | 2009 |
| Rygar | アルゴスの戦士 | Tecmo | Tecmo | Rygar | Platform | Arcade, Sharp X68000, C64, ZX Spectrum, NES, Master System, Lynx, mobile phones, Virtual Console, PlayStation 4 | 1986 |
| Rygar: The Battle of Argus | アルゴスの戦士 マッスルインパクト | Team Tachyon | Tecmo | Rygar | Action-adventure | Wii | 2008 |
| Rygar: The Legendary Adventure | アルゴスの戦士 | Tecmo | Tecmo | Rygar | Action-adventure | PlayStation 2 | 2002 |
| Saboten Bombers | | NMK/Tecmo | Tecmo | None | Platform | Arcade | 1992 |
| Saihai no Yukue | 采配のゆくえ | Omega Force | Koei | None | Strategy | Nintendo DS | 2008 |
| Saiyuki: Journey West | 西遊記 Saiyuki | Koei | Koei | None | Tactical role-playing | PlayStation | 1999 |
| Samurai Cats | のぶニャがの野望 | Koei | Koei | Nobunaga's Ambition | Grand strategy | Microsoft Windows | 2011 |
| Samurai Warriors | 戦国無双 | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation 2, Xbox | 2004 |
| Samurai Warriors: Chronicles | 戦国無双 クロニクル | Omega Force | Koei | Samurai Warriors | Hack and slash | Nintendo 3DS | 2011 |
| Samurai Warriors: Chronicles 3 | 戦国無双 クロニクル3 | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation Vita, Nintendo 3DS | 2014 |
| Samurai Warriors: Katana | 戦国無双 KATANA | Omega Force | Koei | Samurai Warriors | Hack and slash | Wii | 2007 |
| Samurai Warriors: Spirit of Sanada | 戦国無双 真田丸 | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation 3, PlayStation 4, PlayStation Vita, Microsoft Windows, Nintendo Switch | 2016 |
| Samurai Warriors: Xtreme Legends | 戦国無双 猛将伝 | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation 2 | 2004 |
| Samurai Warriors: State of War | 激・戦国無双 | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation Portable | 2005 |
| Samurai Warriors 2 | 戦国無双2 | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation 2, Xbox 360, Microsoft Windows | 2006 |
| Samurai Warriors 2: Empires | 戦国無双2 Empires | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation 2, Xbox 360, Microsoft Windows | 2006 |
| Samurai Warriors 2: Xtreme Legends | 戦国無双2 猛将伝 | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation 2, Xbox 360, Microsoft Windows | 2007 |
| Samurai Warriors 3 | 戦国無双3 | Omega Force Nintendo | JP: Koei Tecmo WW: Nintendo | Samurai Warriors | Hack and slash | Wii | 2009 |
| Samurai Warriors 3: Xtreme Legends | 戦国無双3 猛将伝 | Omega Force | Koei | Samurai Warriors | Hack and slash | Wii | 2011 |
| Samurai Warriors 3 Z | 戦国無双3Z | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation 3 | 2011 |
| Samurai Warriors 3 Z: Special | 戦国無双3Z | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation 3 | 2012 |
| Samurai Warriors 4 | 戦国無双4 | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation 3, PlayStation 4, PlayStation Vita | 2014 |
| Samurai Warriors 4-II | 戦国無双4-II | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation 3, PlayStation 4, PlayStation Vita, Microsoft Windows | 2014 |
| Samurai Warriors 4: Empires | 戦国無双4 | Omega Force | Koei | Samurai Warriors | Hack and slash | PlayStation 3, PlayStation 4, PlayStation Vita | 2015 |
| Sangokushi Battlefield | 三國志 Battlefield | Koei | Koei | Romance of the Three Kingdoms | Real-time strategy | Windows 98 | 2002 |
| Sangokushi Eiketsuden | 三國志英傑伝 | Koei | Koei | Eiketsuden | Tactical role-playing | Microsoft Windows, SNES, Game Boy Advance, PlayStation, MS-DOS, Sega Saturn | 1995 |
| Sangokushi Internet | 三國志 Internet | Koei | Koei | Romance of the Three Kingdoms | Strategy | Microsoft Windows | 1999 |
| Sangokushi Koumeiden | 三國志孔明伝 | Koei | Koei | Eiketsuden | Tactical role-playing | Microsoft Windows, PlayStation, Sega Saturn, Game Boy Advance | 1996 |
| Sangokushi Legion | 三國志レギオン | Koei | Koei | Romance of the Three Kingdoms | Real-time strategy | iOS, Android | 2017 |
| Sangokushi Mobile | 三國志Mobile | Koei | Koei | Romance of the Three Kingdoms | Mobile | Mobile phones | 2002 |
| Sangokushi Mobile 2 | 三國志Mobile 2 | Koei | Koei | Romance of the Three Kingdoms | Mobile | Mobile phones | 2004 |
| Sangokushi Mobile 3 | 三國志Mobile 3 | Koei | Koei | Romance of the Three Kingdoms | Mobile | Mobile phones | 2006 |
| Sangokushi Mobile 4 | 三國志Mobile 4 | Koei | Koei | Romance of the Three Kingdoms | Mobile | Mobile phones | 2008 |
| Sangokushi Online | 三國志Online | Koei | Koei | Romance of the Three Kingdoms | Mobile | Mobile phones | 2008 |
| Sangokushi Retsuden: Ransei no Eiyū Tachi | 三國志曹操伝 | Sega | Sega/Koei | None | Tactical role-playing | SMD | 1991 |
| Sangokushi Sousouden | 三國志曹操伝 | Koei | Koei | Eiketsuden | Tactical role-playing | Microsoft Windows, mobile phones | 1998 |
| Sasami Kisscomi | | Team Tachyon | Tecmo | None | Puzzle | iPhone, iPod Touch | 2009 |
| Sengoku Musou Shoot | 戦国無双 シュート | Tecmo | Tecmo | Samurai Warriors | Hack and slash | iOS, Android | 2014 |
| Senjyo | センジョー | Tehkan | Tehkan | None | Shooter | Arcade, MSX, Xbox | 1983 |
| Persona 3 | ペルソナ3 | Atlus | NA/JP: Atlus EU: Koei | Megami Tensei Persona | Role-playing | PlayStation 2, PlayStation Portable | 2008 |
| Persona 3 FES | ペルソナ3フェス | Atlus | NA/JP: Atlus EU: Koei | Megami Tensei Persona | Role-playing | PlayStation 2 | 2008 |
| Shin Sangokushi | | Koei Tecmo | Koei Tecmo | Romance of the Three Kingdoms | Strategy | iOS, Android | 2018 |
| Shin Sangokumusō Vs | | Koei | Koei | Dynasty Warriors | Hack and slash | Nintendo 3DS | 2018 |
| Silkworm | | Ronald Pieket Weeserik | Tecmo | None | Horizontal scrolling shooter | Arcade, Amiga, Amstrad CPC, Atari ST, Commodore 64, Nintendo Entertainment System, ZX Spectrum | 1988 |
| Söldnerschild | ゼルドナーシルト | Sega | Koei | Rekoeition | Historical role-playing | Sega Saturn | 1997 |
| Söldnerschild Special | ゼルドナーシルト Special | Koei | Koei | Rekoeition | Historical role-playing | PlayStation | 1998 |
| Solomon's Club | ソロモンズ倶楽部 | Tecmo | Tecmo | None | Action Puzzle | Game Boy | 1991 |
| Solomon's Key | ソロモンの鍵 | Tecmo | Tecmo | Solomon's Key | Puzzle | Arcade, Amiga, Amstrad CPC, Atari ST, C64, MS-DOS, Famicom Disk System, Master System, mobile phones, NES, ZX Spectrum, Arcade Archives | 1986 |
| Soreike Kokology | | Sega | Sega/Tecmo | None | Puzzle | Arcade | 1991 |
| Soreike Kokology 2 | | Sega | Sega/Tecmo | None | Puzzle | Arcade | 1993 |
| Soul Master | ソウルマスター | Koei | Koei | None | Tactical role-playing | PlayStation | 1997 |
| SPRay | | Eko System | Tecmo | None | Action-adventure | Wii | 2008 |
| Star Force | スターフォース | Tehkan | Tehkan | Star Force | Shoot 'em up | Arcade, NES, Virtual Console | 1984 |
| Stop That Roach! | ホイホイ ゲームボーイ版 | Koei | Koei | None | Action/puzzle | Game Boy | 1994 |
| Stranger of Paradise: Final Fantasy Origin | Sutorenjā Obu Paradaisu: Fainaru Fantajī Orijin (ストレンジャー オブ パラダイス ファイナルファンタジー オリジン) | Team Ninja | Square Enix | Final Fantasy | Action role-playing | Microsoft Windows, PlayStation 4, PlayStation 5, Xbox One, Xbox Series X/S. | 2022 |
| Strato Fighter | | Tecmo | Tecmo | None | Shooter | Arcade, Xbox | 1991 |
| Strike Gunner S.T.G. | エス・ティー・ジー | Athena | Tecmo | None | Shoot 'em up | Arcade, Super NES | 1991 |
| Super Blackjack | RIO BLACKJACK | Net | Tecmo | Rakushou! Pachi-Slot Sengen | Casino | Arcade | 2009 |
| Super Sangokushi | | Tecmo | Tecmo | Romance of the Three Kingdoms | Strategy | SNES | 1994 |
| Super Sangokushi 2 | | Tecmo | Tecmo | Romance of the Three Kingdoms | Strategy | SNES | 1991 |
| Super Shot Soccer | | Tecmo | Tecmo | None | Arcade-style traditional soccer simulation | PlayStation | 2002 |
| Super Star Force: Jikūreki no Himitsu | スーパースターフォース 時空暦の秘密 | Tecmo | Tecmo | Star Force | Shoot 'em up Adventure | Family Computer | 1986 |
| Super Swing Golf | | Ntreev Soft/Tecmo | Tecmo | Super Swing Golf | Sports, golf | Wii | 2006 |
| Super Swing Golf: Season 2 | | Team Tachyon | Tecmo | Super Swing Golf | Sports, golf | Wii | 2007 |
| Swimmer | スイマ一 | Tehkan | JP: Tecmo WW: Centuri | None | Action | Arcade, Xbox | 1982 |
| Taikō Risshiden | 太閤立志伝 | Koei | Koei | Taikō Risshiden | Turn-based strategy | NEC PC-9801, Super Famicom, Genesis/Mega Drive, Wii | 1992 |
| Taikō Risshiden II | 太閤立志伝II | Koei | Koei | Taikō Risshiden | Turn-based strategy | Microsoft Windows, PlayStation | 1996 |
| Taikō Risshiden III | 太閤立志伝III | Koei | Koei | Taikō Risshiden | Turn-based strategy | Microsoft Windows, PlayStation | 1999 |
| Taikō Risshiden IV | 太閤立志伝IV | Koei | Koei | Taikō Risshiden | Turn-based strategy | Microsoft Windows, PlayStation Portable | 2001 |
| Taikō Risshiden V | 太閤立志伝V | Koei | Koei | Taikō Risshiden | Turn-based strategy | Microsoft Windows, PlayStation Portable | 2004 |
| Tamashii no Mon: Dante no Shinkyoku yori | 魂の門 ダンテ「神曲」より | Koei | Koei | None | Adventure | FM Towns, PC-9801 | 1993 |
| Tecmo Baseball | | Tecmo | Tecmo | Tecmo | Sports, baseball | NES | 1989 |
| Tecmo Bowl | テクモボウル | Tecmo | Tecmo | Tecmo Bowl | Sports, American football | Arcade, NES, Famicom, PlayChoice-10, Game Boy, Virtual Console | 1987 |
| Tecmo Bowl: Kickoff | テクモボウル GB | Polygon Magic | Tecmo | Tecmo Bowl | Sports, American football | Nintendo DS | 2008 |
| Tecmo Bowl Throwback | | Southend Interactive/Tecmo | Tecmo | Tecmo Bowl | Sports, American football | Xbox 360 (XBLA), PlayStation 3 (PSN) | 2010 |
| Tecmo Classic Arcade | | Tecmo | Tecmo | None | Compilation | Xbox | 2005 |
| Tecmo Cup Soccer Game | | Tecmo | Tecmo | Captain Tsubasa | Sports, soccer | NES | 1988 |
| Tecmo Hit Parade | | Tecmo | Tecmo | None | Compilation | PlayStation 2 | 2004 |
| Tecmo Knight | ワイルドファング | Tecmo | Tecmo | None | Beat 'em up | Arcade | 1989 |
| Tecmo NBA Basketball | | Tecmo | Tecmo | Tecmo NBA Basketball | Basketball simulation | NES | 1992 |
| Tecmo's Secret of the Stars | アクタリオン | Tecmo | Tecmo | None | Role-playing | SNES | 1993 |
| Tecmo Sports: Bakuretsu King | | Tecmo | Tecmo | Tecmo | Sports | PlayStation 2 | 2006 |
| Tecmo Stackers | でろーんでろでろ | Tecmo | Tecmo | Tecmo | Puzzle | PlayStation, PlayStation Network | 1995 |
| Tecmo Super Baseball | | Tecmo | Tecmo | Tecmo | Sports, baseball | Super NES, Sega Genesis | 1994 |
| Tecmo Super Bowl | テクモスーパーボウル | Tecmo | Tecmo | Tecmo Bowl | Sports, American football | NES | 1991 |
| Tecmo Super Bowl II: Special Edition | テクモスーパーボウルII スペシャルエディション | Tecmo | Tecmo | Tecmo Bowl | Sports, American football | SNES, Mega Drive | 1994 |
| Tecmo Super Bowl III: Final Edition | | Tecmo | Tecmo | Tecmo Bowl | Sports, American football | SNES, Mega Drive | 1995 |
| Tecmo Super Hockey | | Tecmo | Tecmo | Tecmo | Sports, ice hockey | Sega Genesis | 1994 |
| Tecmo Super NBA Basketball | テクモスーパーNBAバスケットボール | Tecmo | Tecmo | Tecmo NBA Basketball | Basketball simulation | SNES, Sega Genesis | 1992 |
| Tecmo World Cup '90 | | Tecmo | Tecmo | Tecmo | Traditional soccer simulation | Arcade, Mega Drive | 1989 |
| Tecmo World Cup '92 | | Tecmo | Tecmo | Tecmo | Traditional soccer simulation | Arcade, Mega Drive | 1992 |
| Tecmo World Cup '93 | | SIMS | Sega/Tecmo | Tecmo | Traditional soccer simulation | Master System | 1993 |
| Tecmo World Cup '98 | | Tecmo | Tecmo | Tecmo | Traditional soccer simulation | Sega ST-V | 1998 |
| Tecmo World Cup Soccer | | Tecmo | Tecmo | Tecmo | Traditional soccer simulation | NES | 1990 |
| Tecmo World Golf | | Tecmo | Tecmo | Tecmo | Sports, soccer | PlayStation | 1996 |
| Tecmo World Soccer '96 | | SNK | Tecmo | Tecmo | Sports, soccer | Neo Geo | 1996 |
| Tecmo World Wrestling | | Tecmo | Tecmo | Tecmo | Sports, wrestling | NES | 1989 |
| Tecmo's Deception: Invitation to Darkness | 刻命館 | Tecmo | Tecmo | Deception | Strategy-RPG | PlayStation | 1996 |
| Tehkan World Cup | | Tecmo | Tecmo | Tecmo | Sports video game, soccer | Arcade, PlayStation 2, Xbox | 1985 |
| Teitoku no Ketsudan III | 提督の決断III | Koei | Koei | PTO | Strategy | PC-9801, Microsoft Windows, PlayStation, Sega Saturn | 1996 |
| Three Kingdoms Heroes | | Koei Tecmo | Koei Tecmo | Romance of the Three Kingdoms | Turn-based tactics | iOS, iPadOS, macOS, tvOS | 2025 |
| Top Management | ファミコン トップマネジメント | Koei | Koei | Top Management | Business simulation | Family Computer, NEC PC-9801 | 1990 |
| Top Management II | トップマネジメントII | Koei | Koei | Top Management | Business simulation | Super Famicom, NEC PC-9801, Microsoft Windows | 1994 |
| Tōkidenshō Angel Eyes | 闘姫伝承 ANGEL EYES | Tecmo | Tecmo | None | Fighting | Arcade, PlayStation, PlayStation Network | 1996 |
| Tokobot | カラクリ | Tecmo | Tecmo | Tokobot | Platformer | PlayStation Portable | 2005 |
| Tokobot Plus: Mysteries of the Karakuri | コロボットアドベンチャー | Tecmo | Tecmo | Tokobot | Platformer | PlayStation 2 | 2006 |
| Toukiden: Kiwami | 討鬼伝 極 | Omega Force | Tecmo | Toukiden | Action role-playing | PlayStation Portable, PlayStation Vita, PlayStation 4, Microsoft Windows | 2014 |
| Toukiden: The Age of Demons | 討鬼伝 | Omega Force | Tecmo | Toukiden | Action role-playing | PlayStation Portable, PlayStation Vita | 2013 |
| Toukiden 2 | 討鬼伝2 | Omega Force | Tecmo | Toukiden | Action role-playing | PlayStation 3, PlayStation 4, PlayStation Vita | 2016 |
| Trapt | 影牢II: Dark Illusion | Tecmo | Tecmo | Deception | Action-Strategy | PlayStation 2 | 2005 |
| Trinity: Souls of Zill O'll | Trinity: Zill O'll Zero | Omega Force | Koei | Zill O'll | Action RPG | PlayStation 3 | 2010 |
| Tsuppari Ōzumō | つっぱり大相撲 | Tecmo | Tecmo | Tsuppari Ōzumō | Sports video game, sumo | Family Computer, Virtual Console | 1987 |
| Tsuppari Ōzumō: Risshin Shusse Hen | つっぱり大相撲 立身出世編 | Tecmo | Tecmo | Tsuppari Ōzumō | Sports video game, wrestling | Super Famicom | 1993 |
| Uncharted Waters | 大航海時代 (Dai Kōkai Jidai; lit. Great Navigation Era) | Koei | Koei | Uncharted Waters | Historical role-playing | MSX, NES, Sega Mega Drive, SNES | 1991 |
| Uncharted Waters: New Horizons | 大航海時代 New Horizons | Koei | Koei | Uncharted Waters | Historical role-playing | NEC PC-98, SNES, Sega Mega Drive/Genesis, PC, Sega Saturn, PlayStation, Virtual Console, mobile phones | 1994 |
| Uncharted Waters Online | 大航海時代Online | Koei | Koei | Uncharted Waters | Historical role-playing MMORPG | Microsoft Windows | 2010 |
| Undead Knights | アンデッドナイツ | Team Tachyon | Tecmo | None | Action-adventure | PlayStation Portable | 2009 |
| UNiSON | | Tecmo | Tecmo | None | Music | PlayStation 2 | 2000 |
| V-Goal Soccer '96 | | Tecmo | Tecmo | None | Sports, soccer | 3DO Interactive Multiplayer | 1996 |
| Venus Vacation Prism: Dead or Alive Xtreme | | Team Ninja | Koei Tecmo | Dead or Alive Xtreme | Adventure, dating sim | PlayStation 4, PlayStation 5, Microsoft Windows | 2025 |
| Warriors: Abyss | 無双アビス | Omega Force | Koei Tecmo | Warriors | Action, roguelike | PlayStation 4, PlayStation 5, Xbox Series X/S, Microsoft Windows, Nintendo Switch | 2025 |
| Warriors All-Stars | 無双☆スターズ (Musou Stars) | Omega Force | Koei Tecmo | Warriors | Hack and slash | PlayStation 4, PlayStation Vita, Microsoft Windows | 2017 |
| Warriors: Legends of Troy | TROY無双 | Koei Canada | Tecmo Koei | Warriors | Hack and slash | PlayStation 3, Xbox 360 | 2011 |
| Warriors Orochi | 無双 OROCHI | Omega Force | Koei | Warriors | Hack and slash | PlayStation 2, Xbox 360, Microsoft Windows, PlayStation Portable | 2007 |
| Warriors Orochi 2 | 無双 OROCHI 魔王再臨 | Omega Force | Koei | Warriors | Hack and slash | PlayStation 2, PlayStation Portable, Xbox 360 | 2008 |
| Warriors Orochi 3 | 無双 OROCHI 2 | Omega Force | Koei | Warriors | Hack and slash | PlayStation 3, Xbox 360 | 2012 |
| Warriors Orochi 3 Hyper | 無双 OROCHI 2 Hyper | Omega Force | Koei | Warriors | Hack and slash | Wii U | 2012 |
| Warriors Orochi 3 Special | 無双 OROCHI 2 Special | Omega Force | Koei | Warriors | Hack and slash | PlayStation Portable | 2012 |
| Warriors Orochi 3 Ultimate | 無双 OROCHI 2 Ultimate | Omega Force | Koei | Warriors | Hack and slash | PlayStation 3, PlayStation Vita, PlayStation 4, Xbox One, Nintendo Switch | 2013 |
| Warriors Orochi 4 | 無双 OROCHI 3 | Omega Force | Koei | Warriors | Hack and slash | Microsoft Windows, PlayStation 4, Xbox One, Nintendo Switch | 2018 |
| Wild Hearts | | Omega Force | Electronic Arts | None | Action role-playing | PlayStation 5, Microsoft Windows, Xbox Series X/S | 2023 |
| WinBack: Covert Operations | | Omega Force | Koei | None | Third-person shooter | Nintendo 64, PlayStation 2 | 1999 |
| Winning Post | ウイニングポスト | Tecmo Koei | Tecmo Koei | Winning Post | Horse racing, breeding simulation | X68000, Super Famicom, Mega CD, PC98, 3DO, PlayStation, Sega Saturn, Game Boy Advance | 1993 |
| Winning Post 2 | ウイニングポスト2 | Tecmo Koei | Tecmo Koei | Winning Post | Horse racing, breeding simulation | Super Famicom, PlayStation, Sega Saturn | 1995 |
| Winning Post 3 | ウイニングポスト3 | Tecmo Koei | Tecmo Koei | Winning Post | Horse racing, breeding simulation | PlayStation, Sega Saturn | 1997 |
| Winning Post 4 | ウイニングポスト4 | Tecmo Koei | Tecmo Koei | Winning Post | Horse racing, breeding simulation | PlayStation, Dreamcast | 1999 |
| Winning Post 5 | ウイニングポスト5 | Tecmo Koei | Tecmo Koei | Winning Post | Horse racing, breeding simulation | PlayStation 2 | 2001 |
| Winning Post 6 | ウイニングポスト6 | Tecmo Koei | Tecmo Koei | Winning Post | Horse racing, breeding simulation | PlayStation 2, PlayStation Portable, Microsoft Windows | 2003 |
| Winning Post 7 | ウイニングポスト7 | Tecmo Koei | Tecmo Koei | Winning Post | Horse racing, breeding simulation | PlayStation 2, PlayStation 3, Microsoft Windows, Wii, PlayStation Vita | 2005 |
| Winning Post 7 Maximum 2007 | ウイニングポスト7 Maximum 2007 | Tecmo Koei | Tecmo Koei | Winning Post | Horse racing, breeding simulation | PlayStation 2, PlayStation 3 | 2007 |
| Winning Post 7 Maximum 2008 | ウイニングポスト7 Maximum 2008 | Tecmo Koei | Tecmo Koei | Winning Post | Horse racing, breeding simulation | PlayStation 2, PlayStation 3, Microsoft Windows, Wii | 2008 |
| Winning Post 8 2017 | ウイニングポスト8 2017 | Koei Tecmo | Koei Tecmo | Winning Post | Horse racing, breeding simulation | PlayStation 3, PlayStation 4, PlayStation Vita, Microsoft Windows, Nintendo Switch | 2017 |
| Winning Post 8 2018 | ウイニングポスト8 2018 | Koei Tecmo | Koei Tecmo | Winning Post | Horse racing, breeding simulation | PlayStation 4, PlayStation Vita, Microsoft Windows, Nintendo Switch | 2018 |
| Winning Post 9 | ウイニングポスト9 | Koei Tecmo | Koei Tecmo | Winning Post | Horse racing, breeding simulation | Nintendo Switch | 2019 |
| Winning Post World | ウイニングポスト7 World | Tecmo Koei | Tecmo Koei | Winning Post | Horse racing, breeding simulation | PlayStation 2, PlayStation 3, Microsoft Windows, Wii | 2009 |
| Winning Post World 2010 | ウイニングポスト7 World 2010 | Tecmo Koei | Tecmo Koei | Winning Post | Horse racing, breeding simulation | PlayStation 2, PlayStation 3, Xbox 360, Wii | 2010 |
| Winning Post World 8 | ウイニングポスト World 8 | Koei Tecmo | Koei Tecmo | Winning Post | Horse racing, breeding simulation | PlayStation 3, PlayStation 4, PlayStation Vita, Microsoft Windows | 2014 |
| World Cup '94 | | Tecmo | Tecmo | World Cup | Sports, soccer | Arcade | 1994 |
| Wo Long: Fallen Dynasty | | Team Ninja | Koei Tecmo | | Action role-playing | Microsoft Windows, PlayStation 4, PlayStation 5, Xbox One, Xbox Series X/S. | 2023 |
| Yaiba: Ninja Gaiden Z | NINJA GAIDEN Z | Team Ninja | Tecmo | Ninja Gaiden | Hack and slash | PlayStation 3, Xbox 360, Microsoft Windows | 2014 |
| Yanya Caballista: City Skater | Yanya Caballista featuring Gawoo (ヤンヤ カバジスタ featuring Gawoo) | Koei | Koei | None | Skateboarding | PlayStation 2 | 2001 |
| Yo-kai Sangokushi | 妖怪三国志 | Level-5, Koei | Koei | Romance of the Three Kingdoms Yo-kai Watch | Tactical role-playing | Nintendo 3DS | 2016 |
| Yo-kai Sangokushi: Kunitori Wars | 妖怪三国志 国盗りウォーズ | Level-5 | Koei Tecmo | Romance of the Three Kingdoms Yo-kai Watch | Tactical role-playing | iOS, Android | 2018 |
| Zill O'll ~infinite plus~ | | Tecmo Koei | Tecmo Koei | Zill O'll | Role-playing | PlayStation Portable | 2009 |
| Zill O'll ~infinite~ | | Koei | Koei | Zill O'll | Role-playing | PlayStation 2 | 2005 |
| Zill O'll | | Koei | Koei | Zill O'll | Role-playing | PlayStation | 1999 |