| KAAZ | WORLD | |
| Unlicensed |
| KC Nerd | WORLD | |
| Unlicensed |
| KHAN Games 4-in-1 Retro Gamepak | WORLD | 2016 |
retroUSB | Unlicensed |
| KIRU! | WORLD | |
| Unlicensed |
| KUBO | WORLD | 2018-09 |
Dale Coop | Unlicensed |
| KUBO 2 - L'Aventurier Courageux | WORLD | 2019-03 |
Dale Coop | Unlicensed |
| KUBO 3 | WORLD | 2020-07 |
SJ Games | Unlicensed |
| KYFF | WORLD | |
Sly Dog Studios | Unlicensed |
| Kabuki - Quantum Fighter | EU | 1992-02-20 |
HAL Laboratory | Commercial |
| Kabuki - Quantum Fighter | US | 1991-01 |
HAL Laboratory | Commercial |
| Kabushiki Doujou | JP | 1989-05 |
HectorSoft | Commercial |
| Kaettekita! Gunjin Shougi - Nanya Sore! | JP | 1989-05 |
Sofel | Commercial |
| Kage no Densetsu | JP | 1986-04 |
Taito | Commercial |
| Kagerou Densetsu | JP | 1990-05-11 |
Pixel Technologies | Commercial |
| Kaguya Hime Densetsu | JP | 1988-12-16 |
Marvelous Interactive | Commercial |
| Kai Kamo II - Darkwing Duck 2 | AS | |
| Unlicensed |
| Kaijuu Monogatari | JP | 1988-11 |
Namco | Commercial |
| Kaiketsu Yanchamaru | JP | 1987-10-02 |
Data East | Commercial |
| Kaiketsu Yanchamaru 2 - Karakuri Land | JP | 1991-08-30 |
Irem | Commercial |
| Kaiketsu Yanchamaru 3 - Taiketsu! Zouringen | JP | 1993-03 |
Irem | Commercial |
| Kakefu-kun no Jump Tengoku - Speed Jigoku | JP | 1988-07-22 |
Vic Tokai | Commercial |
| Kal's Kitchen | WORLD | |
| Demo |
| Kame no Ongaeshi - Urashima Densetsu | JP | 1988-08-26 |
Hudson Soft | Commercial |
| Kamen Rider Club | JP | 1988-02 |
Bandai | Commercial |
| Kamen Rider SD - Granshocker no Yabou | JP | 1993-01 |
Angel | Commercial |
| Kamen no Ninja - Akakage | JP | 1988-05-20 |
Toei Animation | Commercial |
| Kamen no Ninja - Hanamaru | JP | 1990-03-16 |
Capcom | Commercial |
| Kangti Wu Wang | CN | |
| Unlicensed |
| Kanshakudama Nage Kantarou no Toukaidou Gojuusan Tsugi | JP | 1986-07 |
Sunsoft | Commercial |
| Karakuri Kengou Den Musashi Lord - Karakuribito Hashiru | JP | 1991-10 |
Yutaka | Commercial |
| Karaoke Studio | JP | 1987-07-30 |
Bandai | Commercial |
| Karaoke Studio Senyou Cassette - Top Hit 20 Vol. 1 | JP | 1987-10 |
Bandai | Commercial |
| Karaoke Studio Senyou Cassette - Top Hit 20 Vol. 2 | JP | 1988-02 |
Bandai | Commercial |
| Karate Champ | US | 1986-11 |
Data East USA | Commercial |
| Karate Champ | WORLD | 1986-12 |
Data East USA | Commercial |
| Karate Fox | WORLD | |
| Demo |
| Karate Kick | WORLD | |
| Unlicensed |
| Karateka | AS | 1985-12-05 |
| Unlicensed |
| Karateka | JP | 1985-12-05 |
Soft Pro International | Commercial |
| Karateka | JP | 1985-12-05 |
Soft Pro International | Prototype |
| Karateka | TW | 1985-12-05 |
| Unlicensed |
| Karnov | JP | 1987-12-18 |
Data East | Commercial |
| Karnov | US | 1988-01 |
Data East | Commercial |
| Kart Fighter | AS | 1994-01 |
| Unlicensed |
| Kart Fighter | TW | 1994-01 |
Ge De Industry Co | Unlicensed |
| Kart Racer | WORLD | 2024-06 |
Johnybot | Unlicensed |
| Kart Racer | WORLD | 2024-06 |
Johnybot | Prototype |
| Kart Racer '86 | WORLD | |
| Prototype |
| Katango | WORLD | |
| Unlicensed |
| Kawa no Nushi Tsuri | JP | 1990-08-10 |
Pack-In-Video | Commercial |
| Kazama Jun to Asama Yuuko no AV Dragon Mahjong | JP | 1991 |
Hacker International | Unlicensed |
| Keiba Simulation - Honmei | JP | 1989-04-28 |
Nichibutsu | Commercial |
| Kekkyoku Nankyoku Daibouken | JP | 1985-04 |
Konami Industry | Commercial |
| Kero Kero Keroppi no Daibouken | JP | 1991-03-29 |
Character Soft | Commercial |
| Kero Kero Keroppi no Daibouken 2 - Donuts Ike wa Oosawagi!! | AS | 1993-02-19 |
| Unlicensed |
| Kero Kero Keroppi no Daibouken 2 - Donuts Ike wa Oosawagi!! | JP | 1993-02 |
Character Soft | Commercial |
| Keroppi to Keroriinu no Splash Bomb! | JP | 1993-12-01 |
Character Soft | Commercial |
| Kevin Power in Concert Carnage | US | |
| Unlicensed |
| Kevin Power in Too Many Games | US | 2016-06 |
| Unlicensed |
| Ki no Bouken - The Quest of Ki | JP | 1988-07 |
Namco | Commercial |
| Kick Master | AS | 1992-01 |
| Unlicensed |
| Kick Off | EU | 1992-07-22 |
Imagineer | Commercial |
| Kick Off | EU | 1992-07-22 |
Imagineering | Prototype |
| Kick The Colonel! | WORLD | |
| Demo |
| KickMaster | US | 1992-01 |
Taito America | Commercial |
| Kickle Cubicle | EU | 1990-06 |
Nintendo | Commercial |
| Kickle Cubicle | US | 1990-09 |
Nintendo | Commercial |
| Kid Dracula | WORLD | 1990-10 |
Konami Industry | Commercial |
| Kid Funky | WORLD | |
| Unlicensed |
| Kid Icarus | EU | 1987-02-15 |
Nintendo | Commercial |
| Kid Icarus | US | 1987-07 |
Nintendo | Commercial |
| Kid Klown in Night Mayor World | US | 1993-04 |
Kemco | Commercial |
| Kid Klown in Night Mayor World | US | 1993-04 |
Kemco | Prototype |
| Kid Kool | AS | 1988-07 |
| Unlicensed |
| Kid Kool and the Quest for the Seven Wonder Herbs | US | 1990-03 |
Vic Tokai | Commercial |
| Kid Niki - Radical Ninja | US | 1987-11 |
Data East USA | Commercial |
| Kidou Senshi Z Gundam - Hot Scramble | JP | 1986-08 |
Bandai | Commercial |
| King Kong 2 - Ikari no Megaton Punch | JP | 1986-12-18 |
Konami | Commercial |
| King Neptune's Adventure | US | 1990 |
Color Dreams | Prototype |
| King Neptune's Adventure | US | 1990 |
Color Dreams | Unlicensed |
| King Nothing | WORLD | 2025-04 |
RetroViseur | Unlicensed |
| King of Kings | JP | 1988-12-09 |
Namco | Commercial |
| King's Knight | JP | 1986-09-18 |
Square | Commercial |
| King's Knight | US | 1989-09 |
Square | Commercial |
| King's Quest V | US | 1992-06 |
Konami | Commercial |
| Kingdom Crisis | WORLD | 2023-01 |
Ninja Dynamics | Demo |
| Kingdom Crisis | WORLD | 2023-01 |
Ninja Dynamics | Prototype |
| Kings of the Beach - Professional Beach Volleyball | US | 1990 |
Ultra Games | Commercial |
| Kinnikuman - Muscle Tag Match | JP | 1985-11-08 |
Bandai Namco | Commercial |
| Kinnikuman - Muscle Tag Match | TW | 1985-11-08 |
| Unlicensed |
| Kira Kira Star Night | JP | 2013-08 |
RIKI | Unlicensed |
| Kira Kira Star Night - Furusato Nouzei Fujimino-ban | JP | 2018-07 |
RIKI | Unlicensed |
| Kira Kira Star Night AC | JP | 2016-10 |
Columbus Circle | Unlicensed |
| Kira Kira Star Night DX | US | 2016-10-06 |
Columbus Circle | Unlicensed |
| Kira Kira Star Night DX - Tournament Edition | JP | 2016-07 |
Columbus Circle | Unlicensed |
| Kirai | WORLD | |
| Prototype |
| Kirby's Adventure | CA | 1993-05 |
Nintendo | Commercial |
| Kirby's Adventure | DE | 1993-09-12 |
Nintendo | Commercial |
| Kirby's Adventure | EU | 1993-09-12 |
Nintendo | Commercial |
| Kirby's Adventure | FR | 1993-09-12 |
Nintendo | Commercial |