| MSX cart. |  Keystone Kapers Model R48X5503 | 1984 | Pony Canyon, Inc. Japan |
| MSX cart. | Kick It Model SR-002 | 1986 | Romox Japan |
| MSX cart. | Kill Mice Hb | 2011 | Unknown |
| MSX cart. | Kinasai | 1984 | Hudson Soft. Hudson Group Japan |
| MSX cart. | King & Balloon Model DP-3912007 | 1984 | Dempa Shinbunsha Japan |
| MSX cart. | King' Knight P | 1986 | Square Co., Ltd. Japan |
| MSX cart. | King's Valley | 198? | MegaCom Taiwan |
| MSX cart. | Kinnikuman - Colosseum Deathmatch | 198? | San Ho |
| MSX cart. | Kinnikuman - Colosseum Deathmatch Model BMX-005 | 1985 | Bandai Co., Ltd. Japan |
| MSX cart. | Klondike Solitaire Hb | 2021 | Under4Mhz |
| MSX cart. | Knight Lore | 198? | MegaCom Taiwan |
| MSX cart. | Knight Lore Model ND-04MR | 1986 | JALECO Co., Ltd. Japan |
| MSX cart. | Knightmare - Majou Densetsu | 198? | Zemina Korea |
| MSX cart. | Knightmare - Majou Densetsu Model RC739 | 1986 | Konami Industry Co., Ltd. Japan |
| MSX cart. | Knightmare II - The Maze of Galious | 1987 | Zemina Korea |
| MSX cart. | Knither Special | 1987 | Dempa Shinbunsha Japan |
| MSX cart. | Knowledge | 1988 | Barq |
| MSX cart. | Knuckle Joe | 1989 | ProSoft Korea |
| MSX cart. | Kobashi Hb | 2004 | Van Dam, Vincent |
| MSX cart. | Koedoli | 1988 | Aproman Korea |
| MSX cart. | Konami no Game wo 10-bai Tanoshimu Cartridge Model RC735 | 1985 | Konami Industry Co., Ltd. Japan |
| MSX cart. | Konami no Ping Pong | 198? | Zemina Korea |
| MSX cart. | Konami no Ping Pong Model RC731 P | 1985 | Konami Industry Co., Ltd. Japan |
| MSX cart. | Konami no Shin 10-bai Cartridge Model RC755 | 1988 | Konami Industry Co., Ltd. Japan |
| MSX cart. | Konami's Baseball Model RC724 | 1985 | Konami Industry Co., Ltd. Japan |
| MSX cart. | Konami's Billiards Model RC706 | 1984 | Konami Industry Co., Ltd. Japan |
| MSX cart. | Konami's Boxing Model RC736 | 1985 | Konami Industry Co., Ltd. Japan |
| MSX cart. |  Konami's Football Model RC732 | 1985 | Konami Industry Co., Ltd. Japan |
| MSX cart. | Konami's Golf Model RC723 | 1985 | Konami Industry Co., Ltd. Japan |
| MSX cart. | Konami's Soccer Model RC732 | 1985 | Konami Industry Co., Ltd. Japan |
| MSX cart. | Konami's Tennis | 198? | ProSoft Korea |
| MSX cart. | Konami's Tennis Model RC720 | 1985 | Konami Industry Co., Ltd. Japan |
| MSX cart. | Koneko no Daibouken - Chibi-chan ga Iku Model GPM-124 | 1986 | Casio Computer Co., Ltd. |
| MSX cart. | Koufi Model A001 | 1984 | Al Alamiah |
| MSX cart. | Kralizec 8K Tetris Hb | 2004 | Kralizec |
| MSX cart. | Kralizec Battle Tetris Hb | 2004 | Kralizec |
| MSX cart. | Kralizec Tetris Hb | 2005 | Kralizec |
| MSX cart. | Kung Fu Master | 1983 | ASCII Corp. Japan |
| MSX cart. | Kung-Fu | 198? | Clover Korea |
| MSX cart. | Kung-Fu Taikun | 198? | Zemina Korea |
