| Nintendo NES cart. |  Kid Niki - Radical Ninja Model NES-KD-USA | 1987 | Data East USA, Inc. |
| Nintendo NES cart. |  King Neptune's Adventure Model KE-81016 | 1990 | Color Dreams, Inc. Brea, CA, USA |
| Nintendo NES cart. | King's Knight Model NES-KG-USA | 1989 | Square Co., Ltd. Japan |
| Nintendo NES cart. | King's Quest V Model NES-8Q-USA | 1992 | Konami, Inc. USA |
| Nintendo NES cart. | Kings of the Beach Model NES-VH-USA | 1990 | Ultra Games Ultra Soft. Corp. |
| Nintendo NES cart. | Kirby's Adventure Model NES-KR-CAN | 1993 | Nintendo of America, Inc. USA 45496 |
| Nintendo NES cart. | Kirby's Adventure Model NES-KR-FRA/FRA | 1993 | Nintendo Co., Ltd. Japan |
| Nintendo NES cart. | Kirby's Adventure Model NES-KR-NOE | 1993 | Nintendo of Europe GmbH 45496 |
| Nintendo NES cart. | Kirby's Adventure Model NES-KR-SCN | 1993 | Nintendo Co., Ltd. Japan |
| Nintendo NES cart. | Kirby's Adventure Model NES-KR-USA | 1993 | Nintendo of America, Inc. USA 45496 |
| Nintendo NES cart. |  Kitty's Catch | 1989 | Unknown |
| Nintendo NES cart. | Kiwi Kraze Model NES-2K-USA | 1991 | Taito America Corp. Elk Grove Village, IL, USA |
| Nintendo NES cart. | KlashBall Model NES-4K-USA | 1991 | SOFEL Corp. CA, USA |
| Nintendo NES cart. | Klax Model TGN-019-KX P | 1990 | Tengen, Inc. Milpilas, CA, USA |
| Nintendo NES cart. | Knight Rider Model NES-NR-USA | 1989 | Acclaim Ent., Inc. Glen Cove, NY, USA |
| Nintendo NES cart. | Konami Hyper Soccer Model NES-86-UKV | 1992 | Konami Co., Ltd. Japan |
| Nintendo NES cart. | Krazy Kreatures | 1990 | American Video Ent., Inc. Burlingame, CA, USA |
| Nintendo NES cart. | Krusty's Fun House Model NES-KF-USA | 1992 | Acclaim Ent., Inc. Glen Cove, NY, USA |
| Nintendo NES cart. | Kung Fu 2 | 1991 | Irem America Corp. Redmond, WA, USA |
| Nintendo NES cart. | Kung Fu Model NES-SX-EEC | 1987 | Nintendo Co., Ltd. Japan |
| Nintendo NES cart. | Kung Fu Model NES-SX-ESP | 1987 | Nintendo Co., Ltd. Japan |
| Nintendo NES cart. | Kung Fu Model NES-SX-GBR | 1987 | Nintendo Co., Ltd. Japan |
| Nintendo NES cart. | Kung Fu Model NES-SX-NOE | 1987 | Nintendo Co., Ltd. Japan |
| Nintendo NES cart. | Kung Fu Model NES-SX-UKV | 1987 | Nintendo Co., Ltd. Japan |
| Nintendo NES cart. | Kung Fu Model NES-SX-USA P | 1985 | Nintendo of America, Inc. USA 45496 |
| Nintendo NES cart. | Kung-Fu Heroes Model NES-CE-USA | 1989 | Culture Brain |
| Nintendo NES cart. | L'Abbaye des Morts Hb | 2021 | Broken Studio |
| Nintendo NES cart. | L'Empereur Model NES-QV-USA P | 1991 | KOEI Corp. CA, USA |
| Nintendo NES cart. | La Alfombra Magica Model CN-06 | 1991 | Gluk Video |
| Nintendo NES cart. | La Guerra del Golfo Model CN-07 | 1991 | Gluk Video |
| Nintendo NES cart. | Lala the Magical Hb | 2016 | Mojon Twins, The |
| Nintendo NES cart. | Lan Master Hb | 2011 | Shiru |
| Nintendo NES cart. | Larry LLFLL Model KHG-LL-GBL Hb | 2014 | Retro USB |
| Nintendo NES cart. | Laser Invasion Model NES-8G-USA | 1991 | Konami, Inc. USA |
| Nintendo NES cart. | Last Action Hero Model NES-LA-USA | 1993 | Sony Imagesoft |
| Nintendo NES cart. | Lawn Mower Hb | 2011 | Shiru |
| Nintendo NES cart. | Lee Trevino's Fighting Golf Model NES-FI-USA | 1988 | SNK Corp. of America CA, USA |
| Nintendo NES cart. | Legacy of the Wizard Model NES-LC-USA | 1989 | Broderbund Soft., Inc. CA, USA 47956 |
| Nintendo NES cart. | Legendary Wings Model NES-LE-USA P | 1988 | Capcom USA, Inc. Santa Clara, CA, USA 13388 |
| Nintendo NES cart. | Legends of the Diamond - The Baseball Championship Game Model NES-8L-USA | 1992 | Bandai America, Inc. 45557 |
