| Atari ST disk |  Cybercon III | 1991 | US Gold, Ltd. Birmingham, England 13442 |
| Samsung Gam*Boy cart. | Cyborg Z | 1991 | Zemina Korea |
| MSX cart. | Cyborg Z | 1991 | Zemina Korea |
| Arcade Video game | Cycle Warriors | 1991 | Tatsumi Electronics Co., Ltd. Japan |
| Nintendo Game Boy Cart. | Cyraid Model DMG-WR-USA | 1991 | Nexoft Corp. CA, USA |
| Nintendo Super NES cart. |  D-Force Model SNS-DF-USA | 1991 | Asmik Corp. of America USA |
| Amstrad CPC type-in | D.C.A. | 1991 | Editions SORACOM France |
| Arcade Video game | D.D. Crew Model 317-0182 | 1991 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | D.D. Crew Model 317-0184 | 1991 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game |  D.D. Crew Model 317-0185 | 1991 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | D.D. Crew Model 317-0186 | 1991 | SEGA of America, Inc. San Francisco, CA, USA |
| Arcade Video game | D.D. Crew Model 317-0187 | 1991 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | D.D. Crew Model 317-0190 | 1991 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Nintendo Famicom cart. | D.J. Boy | 1991 | Unknown |
| Sharp X68000 Series 5.25in. disk | D.O. Doki Doki Disk Vol.1 | 1991 | DO Corp. Japan |
| NEC PC-9801 Series 5.25in. disk | D.O. Doki Doki Disk Vol.1 | 1991 | DO Corp. Japan |
| NEC PC-9801/Sharp X68000 disk | D.O. Doki Doki Disk Vol.2 | 1991 | DO Corp. Japan |
| Sharp X68000/NEC PC-88VA disk | D.P.S. SG 2 - Dream Program System SG Set 2 18 | 1991 | Alicesoft Japan |
| NEC PC-9801 Series 5.25in. disk | D.P.S. SG 2 - Dream Program System SG Set 2 18 | 1991 | Alicesoft Japan |
| NEC PC-88 VA disk | D.P.S. SG 2 - Dream Program System SG Set 2 | 1991 | Alicesoft Japan |
| Fujitsu FM Towns disk | D.P.S. SG 2 - Dream Program System SG Set 2 | 1991 | Alicesoft Japan |
| Sharp X68000/NEC PC-88VA disk | D.P.S. SG 3 - Dream Program System SG Set 3 18 | 1991 | Alicesoft Japan |
| NEC PC-9801 Series 5.25in. disk | D.P.S. SG 3 - Dream Program System SG Set 3 18 | 1991 | Alicesoft Japan |
| NEC PC-88 VA disk | D.P.S. SG 3 - Dream Program System SG Set 3 | 1991 | Alicesoft Japan |
| Fujitsu FM Towns disk | D.P.S. SG 3 - Dream Program System SG Set 3 | 1991 | Alicesoft Japan |
| Atari ST disk | D/Generation | 1991 | Mindscape, Inc. Northbrook, IL, USA 24294 |
| IBM PC 5.25in. disk | D/Generation | 1991 | Mindscape, Inc. Northbrook, IL, USA 24294 |
| Coin-op Misc. game | D3 BOS | 1991 | Taito Corp. Japan |
| V.R. game | Dactyl Nightmare | 1991 | Virtuality, Ltd. Virtuality Group |
| IBM PC DOS pack. | Dad's Choice Sw | 1991 | Motes Educational Soft. |
| Atari Lynx cart. |  Daemonsgate | 1991 | Atari Corp. CA, USA |
| Sega Mega Drive cart. | Dahna - Megami Tanjou Model T-64013 | 1991 | IGS Corp. Information Global Service |
| NEC PC-Engine CD | Dai Senpuu Custom Model NAPR-1019 P | 1991 | NEC Avenue, Ltd. Japan |
| Nintendo Famicom cart. | Dai-2-ji Super Robot Taisen Model BAP-N9 | 1991 | Banpresto Japan |
| NEC PC-9801 Series 5.25in. disk | Daigekichin - Nichibei Kaitei no Taiketsu | 1991 | Quota Japan |
| Nintendo Famicom cart. | Daikoukai Jidai Model KOE-QK | 1991 | KOEI Co., Ltd. Japan |
| Nintendo Famicom cart. | Daiku no Gen-san Model IF-24 P | 1991 | Irem Corp. Japan |
| Arcade Video game | Daimakaimura B-Board 91634B-2 | 1991 | Capcom Co., Ltd. Japan |
| Sharp X68000 Series 5.25in. disk | Daisenryaku II - Unit Editor | 1991 | SystemSoft Corp. Japan |
| Sharp X68000 Series 5.25in. disk | Daisenryaku III '90 | 1991 | SystemSoft Corp. Japan |
