| TRS-80 disk |  Demon Attack Model 26-3099 | 1984 | Tandy Corp. |
| Commodore C64 type-in | Demon Dozer | 1984 | Horwood, Ellis |
| Dragon type-in | Demon Driver | 1984 | VNU Business Publications |
| Sinclair ZX Spectrum cass. | Demon Lord | 1984 | Mansfield Computers & Electronics |
| Sanyo MBC-550 disk | Demon Seed | 1984 | Michtron |
| Commodore VIC-20 type-in | Demon Star | 1984 | Compute! Publications, Inc. |
| Fujitsu FM-7 5.25in. disk | Demon's Ring Model FUNW13016 | 1984 | Falcom Japan |
| Fujitsu FM-7 3.5in. disk | Demon's Ring Model FUNW13017 | 1984 | Falcom Japan |
| NEC PC-8801 Series disk | Demon's Ring Model NENW12010 | 1984 | Falcom Japan |
| NEC PC-9801 Series 5.25in. disk | Demon's Ring Model NFNW11002 | 1984 | Falcom Japan |
| Sinclair ZX Spectrum type-in | Demoniak | 1984 | Shift Editions Paris, France |
| Commodore VIC-20 type-in | Demons of Osiris | 1984 | Compute! Publications, Inc. |
| Commodore C64 cass. | Demons of Topaz Model 002017 | 1984 | Firebird Soft. UK 012439 |
| Acorn BBC/Electron cass. | Denis Through the Drinking Glass | 1984 | Applications Soft. Specialities |
| Multitech Microprofessor II type-in | Dephts War | 1984 | Shift Editions Paris, France |
| Applied Technology Microbee cass. | Depth Charge | 1984 | Honeysoft |
| Sinclair ZX Spectrum cass. | Der Krieg Der Welten | 1984 | CRL Group PLC London, England |
| Commodore VIC-20 type-in | Der Schwarze Kasten | 1984 | Springer Basel AG |
| Commodore VIC-20 type-in | Der Wolf und die Fünf Geißlein | 1984 | Springer Basel AG |
| Commodore C64 cass. | Derby Dash | 1984 | Cascade Games, Ltd. |
| Commodore C64 cass. | Derby Day | 1984 | CRL Group PLC London, England |
| Thomson TO7 cart. | Des Chiffres et des Lettres Model 410025 | 1984 | VIFI-Nathan Vifi International |
| Sharp MZ-700 type-in | Des-Illusions | 1984 | Shift Editions Paris, France |
| Commodore C64 type-in | Descent to Kaylon | 1984 | Compute! Publications, Inc. |
| Sharp MZ-700 type-in | Descente aux Enfers | 1984 | Shift Editions Paris, France |
| TRS-80 CoCo disk | Desert Rider Model 26-3292 | 1984 | Radio Shack Fort Worth, TX, USA |
| Dragon cass. | Desperado Dan | 1984 | Blaby Computer Games |
| Sony SMC-777 type-in | Destron | 1984 | Dempa Shinbunsha Japan |
| Colecovision cart. | Destructor | 1984 | Coleco Industries, Inc. Amsterdam, NY, USA |
| Commodore C64 type-in | Detective Q | 1984 | Interface Publications |
| Amstrad CPC cass. | Detective Model SOFT 4902 | 1984 | Amsoft |
| Amstrad CPC cass. | Detective Model SOFT 902 | 1984 | Amsoft |
| Commodore C64 type-in | Detonator | 1984 | Melbourne House UK 015901 |
| Sinclair ZX Spectrum cass. | Deus Ex Machina | 1984 | Automata U.K., Ltd. |
| Commodore C64 type-in | Deutsch & Englisch | 1984 | Moderne Verlags-Gesellschaft |
| Commodore C64 type-in | Devastator | 1984 | Compute! Publications, Inc. |
| IBM PC type-in | Devastator | 1984 | Compute! Publications, Inc. |
| Sinclair ZX Spectrum cass. | Devil Diver | 1984 | DK Tronics |
| Sharp MZ-80B type-in | Devil of Stone | 1984 | Dempa Shinbunsha Japan |
| Pinball | Devil Riders | 1984 | Zaccaria Bologna, Italy |
