| Memotech MTX cass. |  Cobra Model XAP2 | 1984 | Xaviersine Audio Products |
| Commodore C64 cart. | Coccinelle cherche dessinateur | 1984 | Ediciel Matra & Hachette Paris, France |
| Tangerine Oric 1 cass. | Cock'in | 1984 | PRISM Micro-informatique S.A. France |
| Hitachi MB-6890 (BM-LIII) type-in | Cockpit Man | 1984 | Dempa Shinbunsha Japan |
| Sord M.5 BASIC-I type-in | Cockpit Test | 1984 | Dempa Shinbunsha Japan |
| MSX cass. | Coco in the Castle | 1984 | Kuma Computers, Ltd. England |
| Atari 400/800 disk | Coco-Notes | 1984 | CBS Soft. |
| Commodore C64 cart. | Coco-Notes featuring... the Jazz Scats! | 1984 | Dovetail Group, Inc., The |
| Atari 400/800 cart. | CocoNotes Model 4L-9847 | 1984 | CBS Soft. |
| MSX cass. | Cocos | 1984 | Advance Spain |
| Commodore VIC-20 type-in | Code | 1984 | Grisewood & Dempsey |
| Sinclair ZX Spectrum cass. | Code-Woord | 1984 | Wolters Soft. |
| Sinclair ZX Spectrum cass. | Codebook Caper | 1984 | Scorpio Gamesworld |
| Commodore VIC-20 type-in | Codemaker | 1984 | Grisewood & Dempsey |
| Sinclair ZX Spectrum cass. | Codename Mat II Model 011-6 | 1984 | Domark Group, Ltd. |
| Commodore C64 cass. | Codename Mat II Model 012-4 | 1984 | Domark Group, Ltd. |
| Sinclair ZX Spectrum cass. | Codename MAT Model QTC 725 | 1984 | Micromega |
| Sharp PC-1211 type-in | Coffre-Fort | 1984 | Shift Editions Paris, France |
| Sinclair ZX Spectrum cass. | Colditz Model PA012 | 1984 | Phipps Associates |
| Commodore C64 type-in | Collision | 1984 | Elcomp Publishing |
| Commodore C64 type-in | Colony | 1984 | Interface Publications |
| MSX cart. | Color Ball | 1984 | Hudson Soft. Hudson Group Japan |
| Fujitsu FM-7 cass. | Color Ball Model LA-1055 | 1984 | Hudson Soft. Hudson Group Japan |
| Sharp X1 cass. | Color Ball Model X-1077 | 1984 | Hudson Soft. Hudson Group Japan |
| NEC PC-8001mkII cass. | Color Ball Model YB-1040 | 1984 | Hudson Soft. Hudson Group Japan |
| Commodore C64 type-in | Colorbot | 1984 | Gruppo Editoriale Jackson |
| Thomson TO disk | Coloric | 1984 | Free Game Blot |
| Thomson MO5/TO7 cass. | Coloric | 1984 | Free Game Blot |
| Amstrad CPC 464 disk | Coloric | 1984 | Free Game Blot |
| Exelvision EXL 100 cass. | Coloric | 1984 | Free Game Blot |
| Alice 32/90 cass. | Coloric/La Marelle Model 0000323 | 1984 | Matra Datasysteme Paris, France |
| Amstrad CPC cass. | Colossal Adventure | 1984 | Level 9 Computing |
| Commodore C64 cass. | Colossus Chess 2 | 1984 | CDS Soft., Ltd. |
| Atari 400/800 disk | Colossus Chess Ver.3 | 1984 | English Soft. |
| Tatung Einstein disk | Colour Fantasia | 1984 | Kuma Computers, Ltd. England |
| Colour Genie cass. | Colour Genie Chess | 1984 | Gumboot Soft. |
| Colour Genie cass. | Colour Genie Flugsimulator | 1984 | TCS Trommeschläger Computer Studio |
| Commodore VIC-20 type-in | Colourcode | 1984 | Markt & Technik |
| Commodore C64 type-in | Coloured Tiles | 1984 | Guild Publishing |
| Commodore C64 type-in | Colourgrid | 1984 | Guild Publishing |
