| Texas Instruments TI-57 soft. |  Horse Race | 1978 | Texas Instruments |
| BASIC soft. type-in | Horserace | 1978 | Workman Publishing NY, USA |
| Apple II cass. | Hot Air Balloon | 1978 | Keyser, Earl |
| Handheld game | Hot Wheels Drag Race | 1978 | Funtronics Mattel, Inc. |
| Pinball | House of Diamonds | 1978 | Zaccaria Bologna, Italy |
| Atari 2600 cart. |  Human Cannonball Model CX2627P | 1978 | Atari, Inc. CA, USA |
| Atari 2600 cart. | Human Cannonball Model CX2627 | 1978 | Atari, Inc. CA, USA |
| Atari 2600 cart. | Hunt & Score Model CX2642P | 1978 | Atari, Inc. CA, USA |
| Atari 2600 cart. | Hunt & Score Model CX2642 | 1978 | Atari, Inc. CA, USA |
| Commodore PET cass. | Hurkle P | 1978 | Creative Computing Soft. |
| BASIC soft. type-in | Hurkle | 1978 | Workman Publishing NY, USA |
| Apple II cass. | I Got Mine | 1978 | Softape |
| Pinball | Ice Mania | 1978 | IDI s.n.c. Italy |
| UNIVAC I soft. | IGM | 1978 | Van Diepen, Peter |
| Mattel Intellivision cart. | IMI Test Cartridge | 1978 | Mattel Electronics Mattel, Inc. |
| Intel 8080 CPU soft. | Incredizing | 1978 | 1001001, Inc. |
| Redemption mechanical game | Interchange | 1978 | Unknown Japan |
| Redemption mechanical game | Interchange | 1978 | Shiba Shokai, Inc. Japan |
| Arcade Video game | Invasione | 1978 | Midcoin |
| Video Slot Machine | Jack Lot | 1978 | Data East Corp. Japan |
| DEC PDP-11 disk | Jacpot | 1978 | Byte Publications, Inc. |
| Pinball | Jai-Alai | 1978 | Sonic, S.A. Madrid, Spain |
| Phillips Videopac cart. | Jeu de Quilles + Basketball | 1978 | Radiola La Radiotechnique Paris, France |
| HP-67 soft. | Jive Turkey P | 1978 | Unknown |
| Arcade Video game | JoJo | 1978 | Unknown |
| Pinball | Joker Poker Model 417 | 1978 | Gottlieb & Co., D. Chicago, IL, USA |
| DEC PDP-11 disk | Joust | 1978 | Yarbrough, Alan |
| Arcade Video game |  Jumpers | 1978 | Burkheister Scituate, MS, USA |
| Texas Instruments TI-57 soft. | Keno | 1978 | Texas Instruments |
| Apple II cass. | Kidstuff | 1978 | Speakeasy Soft. |
| BASIC soft. type-in | Kinema | 1978 | Workman Publishing NY, USA |
| Apple II cass. | King | 1978 | Programmer Soft. |
| BASIC soft. type-in | King | 1978 | Workman Publishing NY, USA |
| Heath/Zenith H8 soft. | Kingdom P | 1978 | Multi-Micro Media Corp. |
| UNIVAC I soft. | Kingdoms | 1978 | Unknown |
| TRS-80 cass. | Knight's Quest + Robot Chase + Horse Race Model 0003R | 1978 | Instant Soft., Inc. |
| Interact Family Computer cass. | Knockdown | 1978 | Interact Electronics |
| Pinball | Knockout Blow | 1978 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Magnavox Odyssey² cart. | Las Vegas Blackjack! Model AJ9401 | 1978 | Magnavox Co., The Fort Wayne, IN, USA |
| Non-Coin Game | Las Vegas Model PJ2442YL01 | 1978 | Mattel Electronics Mattel, Inc. |
