| Arcade Video game |  Kidou Senshi SD Gundam - Psycho Salamander no Kyoui oh | 1991 | Banpresto Japan |
| NEC PC-9801 Series 5.25in. disk | Kids - SAP 2nd. File | 1991 | Great Japan |
| NEC PC-9801 Series 5.25in. disk | Kigen - Kagayaki no Hasha | 1991 | Riverhill Soft. Japan |
| Sharp X68000 Series 5.25in. disk | Kikori no Yosaku | 1991 | IJI Team |
| Sinclair ZX Spectrum pack. |  Kikstart II Model 405 | 1991 | EDOS Electronic Distribution of Software |
| Amstrad CPC pack. | Kikstart II Model 405 | 1991 | EDOS Electronic Distribution of Software |
| Commodore Amiga 500 pack. | Kikstart II Model 405 | 1991 | EDOS Electronic Distribution of Software |
| Commodore C64 pack. | Kikstart II Model 405 | 1991 | EDOS Electronic Distribution of Software |
| Gamate cart. | Kill Shot Model C1015 | 1991 | Bit Corp. |
| Amstrad CPC 464 disk | Killerball | 1991 | Microïds |
| Atari ST disk | Killerball | 1991 | Microïds |
| Commodore Amiga 500 disk | Killerball Action Sport | 1991 | Microïds |
| Sharp X68000 Series 5.25in. disk | Kimi Dake ni Ai wo... 18 | 1991 | Game Technopolis Japan |
| NEC PC-9801 Series 5.25in. disk | Kimi Dake ni Ai wo... 18 | 1991 | Game Technopolis Japan |
| Sega Game Gear cart. | Kinetic Connection Model G-3401 | 1991 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sinclair ZX Spectrum cass. | King | 1991 | Psychaedelic Hedgehog Soft. |
| NEC PC-8801 Series disk | King Breeder | 1991 | Artec Japan |
| SNK Neo-Geo AES cart. | King of the Monsters Model NGH-016 | 1991 | SNK Corp. Shin Nihon Kikaku Japan |
| SNK Neo-Geo MVS cart. | King of the Monsters Model NGM-016 | 1991 | SNK Corp. Shin Nihon Kikaku Japan |
| Lviv PK-01 cass. | King Valley | 1991 | Chistyakov A.C. Ukraine |
| IBM PC 3.5in. disk | King's Bounty | 1991 | New World Computing, Inc. |
| Commodore Amiga 500 disk | King's Bounty | 1991 | New World Computing, Inc. |
| Commodore C64 disk | King's Bounty | 1991 | New World Computing, Inc. |
| Sega Mega Drive cart. |  King's Bounty - The Conqueror's Bounty | 1991 | Electronic Arts CA, USA 14633 |
| Sega Genesis cart. | King's Bounty - The Conqueror's Quest Model 7033 P | 1991 | Electronic Arts CA, USA 14633 |
| Commodore Amiga 500 disk | King's Quest I - Quest for the Crown Enhanced | 1991 | Sierra On-Line, Inc. USA 20626 |
| IBM PC 3.5in. disk | King's Quest III - To Heir is Human Model 74266 | 1991 | Sierra On-Line, Inc. USA 20626 |
| Commodore Amiga 500 disk | King's Quest V - Absence Makes The Heart Go Yonder | 1991 | Sierra On-Line, Inc. USA 20626 |
| NEC PC-9801 Series 5.25in. disk | King's Quest V - Absence Makes the Heart Go Yonder | 1991 | Sierra On-Line, Inc. USA 20626 |
| Fujitsu FM Towns CD | King's Quest V - Absence Makes the Heart Go Yonder | 1991 | Sierra On-Line, Inc. USA 20626 |
| Nintendo Game Boy Cart. | Kingyo Chuuihou Wapiko no Wakuwaku Stamp Rally! Model DMG-KTJ | 1991 | Yutaka |
| Handheld game | Kinnikuman | 1991 | Bandai Co., Ltd. Japan |
| Commodore C64 disk | KIS - Keep It Simple | 1991 | RUN-IDG Communications |
| Chess board | Kishon Chesster | 1991 | Fidelity Electronics |
| Nintendo Game Boy Cart. | Kitchen Panic Model DMG-KPJ | 1991 | Coconuts Japan |
| 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 |
| Sega Master System cart. | Klax Model 301040-0160 P | 1991 | Tengen, Inc. Milpilas, CA, USA |
| Nintendo Game Boy Cart. | Klax Model DMG-KX-USA | 1991 | Mindscape, Inc. Northbrook, IL, USA 24294 |
| Amstrad CPC pack. | Knight Force Model 888 | 1991 | EDOS Electronic Distribution of Software |
