| North Star Horizon disk |  Crazy Ball P | 1978 | McPheters, Wolfe & Jones |
| Arcade Video game | Crazy Balls | 1978 | EGS Italy |
| Pinball | Crazy Race | 1978 | Recel, S.A. Madrid, Spain |
| TRS-80 type-in | Cribbage | 1978 | SoftSide Publications, Inc. |
| Texas Instruments SR-52 soft. | Cross-Country Balloon Trip | 1978 | 1001001, Inc. |
| BASIC soft. type-in | Cube | 1978 | Workman Publishing NY, USA |
| Apple II cass. | Cubik Model ADG0113 | 1978 | Powersoft, Inc. |
| UNIVAC I soft. | Dark Horse | 1978 | Rathsman, Ulf |
| Coin-op Misc. game | Dark Invader | 1978 | Ramtek Corp. Sunnyvale, CA, USA |
| Apple II cass. | Datamover + Telepong | 1978 | Apple Computer, Inc. |
| Arcade Video game | Dawn Patrol | 1978 | Mirco Games, Inc. Phoenix, AZ, USA |
| Arcade Video game | Dead Eye | 1978 | Meadows Games, Inc. Sunnyvale, CA, USA |
| Redemption mechanical game | Dead Line | 1978 | Nintendo Co., Ltd. Japan |
| Slot Machine | Deal & Draw Model 1166 | 1978 | Bally Mfg. Co. Chicago, IL, USA |
| Bally Astrocade cart. | Dealer Demo Model 6001 | 1978 | Bally Mfg. Co. Chicago, IL, USA |
| Xerox Alto soft. | Death Star | 1978 | Ball, Eugene |
| DEC PDP-10 soft. | DECWAR | 1978 | Schneider, Robert |
| Intel 8080 CPU soft. | Deflection | 1978 | 1001001, Inc. |
| PolyMorphic Poly-88 cass. | Deflection P | 1978 | 1001001, Inc. |
| Texas Instruments TI-57 soft. | Deluxe Baseball | 1978 | Texas Instruments |
| BASIC soft. type-in | Depth Charge | 1978 | Workman Publishing NY, USA |
| Apple II cass. | Depth Charge Model AP045 | 1978 | Programma International, Inc. |
| Arcade Video game |  Depthbomb | 1978 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Apple II cass. | Desert/Arctic Survival | 1978 | Keyser, Earl |
| Arcade Video game | Destroyer | 1978 | Leijac Corp. Japan |
| Pinball | Devil | 1978 | Nordamatic Verona, Italy |
| Arcade Video game | Devil Circus | 1978 | Hoei International, Inc. Japan |
| TRS-80 cass. |  Devil's Dungeon | 1978 | Rainbow Computing, Inc. |
| Apple II cass. | Devil's Dungeon P | 1978 | Rainbow Computing, Inc. |
| Apple II cass. | Devil's Dungeon P | 1978 | Apple Pugetsound Program Library Exchange |
| Commodore PET cass. | Devil's Dungeon P | 1978 | Personal Soft., Inc. |
| HP-19C soft. | Dice | 1978 | Personal Programming Center |
| Handheld game | Digital Derby Auto Raceway | 1978 | Tomy |
| Handheld game | Digital Diamond | 1978 | Tomy |
| BASIC soft. type-in | Digits | 1978 | Workman Publishing NY, USA |
| Pinball | Disco Fever | 1978 | Williams Mfg. Co. Chicago, IL, USA |
| Bingo | Dixieland Model 1171 | 1978 | Bally Mfg. Co. Chicago, IL, USA |
| Arcade Video game | Dog Patch Model 644 | 1978 | Midway Mfg. Co. Schiller Park, IL, USA |
| Interact Family Computer cass. | Dogfight | 1978 | Interact Electronics |
| Apple II cass. | Dojowo | 1978 | Programmer Soft. |
