| Sinclair ZX Spectrum cass. |  Alien Syndrome Model RAD1SC | 1987 | RAD UK |
| Sinclair ZX Spectrum cass. | Alien Model BBS 076 | 198? | Bug-Byte London, England |
| Sinclair ZX Spectrum cass. |  Aliens | 1983 | Professional Soft. |
| Sinclair ZX Spectrum cass. |  Aliens | 198? | Proein Soft Line Spain |
| Sinclair ZX Spectrum cass. | Aliens - Neoplasma Hb | 2019 | Sanchez crew |
| Sinclair ZX Spectrum cass. | Aliens - The Computer Game US Version Model AS715 | 198? | Alternative Soft., Ltd. |
| Sinclair ZX Spectrum cass. | Aliens - The Computer Game US Version Model URK 621 | 1987 | Electric Dreams Soft. |
| Sinclair ZX Spectrum cass. | Aliens - The Computer Game Model 2MT134 | 198? | Dro Soft. Madrid, Spain |
| Sinclair ZX Spectrum cass. | Aliens - The Computer Game Model RS 027 | 198? | Ricochet Mastertronic Group UK |
| Sinclair ZX Spectrum cass. | Aliens - The Computer Game Model URK 614 | 1986 | Electric Dreams Soft. |
| Sinclair ZX Spectrum cass. | Aliens US | 1987 | Electric Dreams Soft. |
| Sinclair ZX Spectrum cass. | Alky Ollie | 1984 | Firecracker |
| Sinclair ZX Spectrum cass. | All Hallows - Rise of the Pumpkin Hb | 2018 | Rucksack Games |
| Sinclair ZX Spectrum cass. | All in a Day's Work | 1996 | Zenobi Soft. |
| Sinclair ZX Spectrum cass. | All or Nothing | 1984 | Abbex Electronics |
| Sinclair ZX Spectrum cass. | All Or Nothing | 198? | Prism Leisure Corp. plc UK 014293 |
| Sinclair ZX Spectrum cass. | All Present And Correct Hb | 2009 | Smith, Bob |
| Sinclair ZX Spectrum cass. | All Stars | 1988 | Edge, The |
| Sinclair ZX Spectrum cass. | All Time Great Tour | 1992 | Lambourne Games |
| Sinclair ZX Spectrum cass. | All-American Basketball | 1992 | Zeppelin Games |
| Sinclair ZX Spectrum cass. | Alma De Guerrero Hb | 2003 | Beyker Soft |
| Sinclair ZX Spectrum cass. | Alone in Dark Maze Hb | 2019 | Krapivin, Dmitry |
| Sinclair ZX Spectrum cass. | Alpha-Beth | 1984 | A&F Soft. |
| Sinclair ZX Spectrum cass. | Alpha-Gen | 1985 | A&F Soft. |
| Sinclair ZX Spectrum cass. | Alphabet Games | 1983 | Sinclair Research, Ltd. |
| Sinclair ZX Spectrum cass. | Alphabet Soup | 1984 | Reflex Soft. Developments |
| Sinclair ZX Spectrum cass. | Alphabet Zoo | 1984 | Spinnaker Soft. Corp. |
| Sinclair ZX Spectrum cass. | Alphabetter | 1985 | Macmillan Soft. |
| Sinclair ZX Spectrum cass. | Alpine Games Model AT 336 | 1987 | Atlantis Soft. |
| Sinclair ZX Spectrum cass. | Alstrad | 1991 | Guild, The |
| Sinclair ZX Spectrum cass. | Alstrad | 199? | Adventure Workshop, The |
| Sinclair ZX Spectrum cass. | Alta Tension | 1987 | Erbe Soft. Spain |
| Sinclair ZX Spectrum cass. | Altair ZX Hb | 2014 | Inmensa Bola de Manteca |
| Sinclair ZX Spectrum cass. | Alter Ego Hb | 2011 | RetroSouls |
| Sinclair ZX Spectrum cass. | Alter-Earth | 1984 | Double Play Adventures UK |
| Sinclair ZX Spectrum cass. | Altered Beast P | 1989 | Activision, Inc. Menlo Park, CA, USA 47875 |
| Sinclair ZX Spectrum cass. | Altered Beast Model LYSEC-711 | 1989 | MCM Soft. Spain |
| Sinclair ZX Spectrum cass. | Alternative World Games | 198? | Erbe Soft. Spain |
| Sinclair ZX Spectrum cass. | Alternative World Games Model 019664 | 1987 | Gremlin Graphics Soft., Ltd. 013658 |
| Sinclair ZX Spectrum cass. | Amadeus | 1987 | Individual Soft. Service Germany |
