| Arcade Video game |  Irem Declares WW III | 1981 | Irem Corp. Japan |
| Pinball | Iron Maiden | 1981 | Stern Electronics, Inc. Elk Grove Village, IL, USA |
| Sharp MZ-80K type-in | J-Checkers | 1981 | IPC Business Press, Ltd. |
| Apple II 5.25 disk | Jabbertalky | 1981 | Automated Simulations, Inc. |
| TRS-80 disk | Jabbertalky | 1981 | Automated Simulations, Inc. |
| Nascom cass. | Jailbreak in Space | 1981 | Program Power |
| Apple II 5.25 disk | Jawbreaker | 1981 | On-Line Systems USA |
| Commodore VIC-20 cart. | Jelly Monster Model VIC-1905 | 1981 | Commodore, Ltd. |
| Apple II 5.25 disk | Jellyfish | 1981 | Sirius Soft., Inc. Sacramento, CA, USA |
| Atari 400/800 cass. | Jigsaws - Baa Baa Black Sheep | 1981 | Thorn EMI Video, Ltd. UK |
| Atari 400/800 disk | Jigsaws - Baa Baa Black Sheep | 1981 | Thorn EMI Video, Ltd. UK |
| Atari 400/800 disk | Jigsaws - Hickory Dickory Dock | 1981 | Thorn EMI Video, Ltd. UK |
| Atari 400/800 disk | Jigsaws - Jack & Jill | 1981 | Thorn EMI Video, Ltd. UK |
| Atari 400/800 disk | Jigsaws - London Bridge | 1981 | Thorn EMI Video, Ltd. UK |
| Atari 400/800 disk | Jigsaws - Notre Dame | 1981 | Thorn EMI Video, Ltd. UK |
| Atari 400/800 disk | Jigsaws - Pathenogen | 1981 | Thorn EMI Video, Ltd. UK |
| Atari 400/800 disk | Jigsaws - Rome | 1981 | Thorn EMI Video, Ltd. UK |
| Atari 400/800 disk | Jigsaws - Tower of London | 1981 | Thorn EMI Video, Ltd. UK |
| Atari 400/800 disk | Jigsaws - Windsor Castle | 1981 | Thorn EMI Video, Ltd. UK |
| Arcade Video game | Jongputer | 1981 | Alpha Denshi Co., Ltd. Japan |
| PTC SOL-20 cass. | Jotto P | 1981 | Hopkins, Ralph |
| Arcade Video game | Jump Bug | 1981 | Rock-Ola Mfg. Corp. Chicago, IL, USA |
| Phillips Videopac cart. | Jumping Acrobats Model 33 | 1981 | Philips Corp. |
| Pinball | Jungle Lord | 1981 | Williams Electronics, Inc. Chicago, IL, USA |
| Applied Technology Microbee cass. | Jungle Raiders | 1981 | Dubois & McNamara Soft. |
| TRS-80 cass. | Jungle Raiders | 1981 | Displayed Video Ypsilanti, MI, USA |
| Arcade Video game |  Jungler | 1981 | Stern Electronics, Inc. Elk Grove Village, IL, USA |
| Tomy Tutor cart. | Jungler | 1981 | Tomy |
| Arcade Video game | Jungler Model GX327 | 1981 | Konami Industry Co., Ltd. Japan |
| Sinclair ZX-81 cass. | Junior Maths 1 | 1981 | Rose Cassettes |
| Sinclair ZX-81 cass. | Junior Maths 2 | 1981 | Rose Cassettes |
| Handheld game | Jupiter 2051 | 1981 | Morioka Tokei, Inc. |
| Commodore VIC-20 cart. | Jupiter Lander Model VIC-1907 | 1981 | Commodore, Ltd. |
| Atari 400/800 cart. | K-Razy Kritters | 1981 | K-Byte |
| Atari 400/800 cart. | K-Razy Shoot Out | 1981 | K-Byte |
| Magnavox Odyssey² cart. | K.C. Munchkin! Model AC9435 | 1981 | Philips Corp. |
| Tabletop game | K28 - Talking Learning Computer Model 7-230 | 1981 | Tiger Electronic Toys, Inc. Orchard Mundelein, IL, USA |
| Atari 2600 cart. | Kaboom - Schneller Als der Knall Model 711 010-720 | 1981 | Ariolasoft Germany |
| Atari 2600 cart. | Kaboom! Model AG-010 | 1981 | Activision, Inc. Santa Clara, CA, USA 47875 |
| Atari 2600 cart. | Kaboom! Model CAX-010 | 1981 | Activision, Inc. Santa Clara, CA, USA 47875 |
