| Commodore C64 cass. |  Klax Model 473-1 | 1990 | Domark Group, Ltd. |
| Commodore C64 cass. | Knight Games 2 - Space Trilogy | 1987 | English Soft. |
| Commodore C64 cass. | Knight Games Model 150 | 1986 | English Soft. |
| Commodore C64 cass. | Knight Rider Model 020100 | 1986 | Ocean Soft., Ltd. 13156 |
| Commodore C64 cass. | Knight-Tyme | 1986 | Mastertronic, Ltd. UK 012967 |
| Commodore C64 cass. | Knightmare | 1987 | Ricochet Mastertronic Group UK |
| Commodore C64 cass. | Knockout | 1985 | Alligata Soft. |
| Commodore C64 cass. | Knuckle Busters | 1986 | Ricochet Mastertronic Group UK |
| Commodore C64 cass. | Kobayashi Naru | 1987 | Mastertronic, Ltd. UK 012967 |
| Commodore C64 cass. |  Kobyashi Naru | 199? | Guild, The |
| Commodore C64 cass. | Kokotoni Wilf Model 020019 | 1984 | Elite Systems, Ltd. |
| Commodore C64 cass. | Kokotoni Wilf Model 030179 | 198? | Encore 012189 |
| Commodore C64 cass. | Kolonialmacht | 1987 | Ariolasoft Germany |
| Commodore C64 cass. | Konami's Pooyan | 1983 | US Gold, Ltd. Birmingham, England 13442 |
| Commodore C64 cass. | Kong | 1983 | Anirog Soft., Ltd. |
| Commodore C64 cass. | Kong Strikes Back | 1985 | Ocean Soft., Ltd. 13156 |
| Commodore C64 cass. | Kongo Kong | 1983 | Victory Soft. |
| Commodore C64 cass. | Kongo Kong Model MOG 1002 | 1983 | Mogul Communications, Ltd. |
| Commodore C64 cass. | Kosmic Kanga | 1984 | Micromania France |
| Commodore C64 cass. | KP Skips Action Biker with Clumsy Colin | 1985 | Mastertronic, Ltd. UK 012967 |
| Commodore C64 cass. | Krakout | 1989 | Kixx 013442 |
| Commodore C64 cass. | Krakout Model 030300 | 1987 | Gremlin Graphics Soft., Ltd. 013658 |
| Commodore C64 cass. | Krazy Kar | 1984 | IJK Soft., Ltd. |
| Commodore C64 cass. | Krazy Kong | 1983 | Bubble Bus Soft. |
| Commodore C64 cass. | Krisp Model CM 012 | 198? | Sprites France |
| Commodore C64 cass. | Kromazone | 1987 | MAD Mastertronic Added Dimension |
| Commodore C64 cass. | Kwah! | 1986 | Melbourne House UK 015901 |
| Commodore C64 cass. | Kwik Snax | 1990 | Codemasters Soft. Co., Ltd., The 015026 |
| Commodore C64 cass. | L.A. SWAT | 1986 | Mastertronic, Ltd. UK 012967 |
| Commodore C64 cass. | La Aventura Original | 1989 | Aventuras AD, S.A. Spain |
| Commodore C64 cass. | La Batalla de Inglaterra | 198? | PSS Personal Soft. Services 012484 |
| Commodore C64 cass. | Labyrinth | 1983 | Commodore, Ltd. |
| Commodore C64 cass. | Labyrinth - The Computer Game Model UDK 143 | 1986 | Activision, Inc. Mountain View, CA, USA 47875 |
| Commodore C64 cass. | Lancer-Lord | 1983 | Rabbit Soft. |
| Commodore C64 cass. | Land of Neverwhere | 1987 | Power House, The UK |
| Commodore C64 cass. | Land of the Purple Sea | 199? | Adventure Workshop, The |
| Commodore C64 cass. | Land of the Purple Sea | 199? | Guild, The |
| Commodore C64 cass. | Las Vegas Video Poker | 1986 | Mastertronic, Ltd. UK 012967 |
| Commodore C64 cass. | Laser Zone | 1983 | Llamasoft |
| Commodore C64 cass. | Laserwheel | 1987 | Mastertronic, Ltd. UK 012967 |
