| 2025-01-15 | Overkoban | Futility Games | 2013 |
| 2018-11-13 | Overheap (24th @ CPCRetroDev 2018) | BastaCPC | 2018 |
| 2013-08-14 | Overdrive | Your Computer | 1985 |
| 2022-12-22 | Outlaws (1st @ CPCRetroDev 2016)
Outlaws Reloaded | Retro Bytes Productions | 2016/2017 |
| 2018-11-24 | Outlaw | Players | 1990 |
| 2025-07-21 | Out Run Europa
OutRun Europa | Usgold | 1991 |
| 2025-07-21 | Out Run | Usgold / Sega | 1987 |
| 2016-03-10 | Out of this World (Andrew Richards) | Boxsoft | 1987/2016/ |
| 2025-09-16 | Out of this World | Reaktor / Ariolasoft | 1987 |
| 2026-01-20 | Othello (Computing with the Amstrad) | Computing with the Amstrad | 1986 |
| 2025-02-20 | Othello (Computer Challenges for the Amstrad) | Duckworth | 1985 |
| 2023-09-06 | Osprey! | Bourne Educational Software / Amsoft | 1984 |
| 2024-08-17 | Osotos | | 2024 |
| 2025-02-23 | Oscar in a Jam | Argus Press | 1985/1986 |
| 2018-07-27 | Ormen Slange | | 1987/2018 |
| 2026-03-14 | Orion Prime | Arkos / Cargosoft | 2009 |
| 2015-02-15 | Oriental Games | Micro Style / Firebird / Microprose | 1990 |
| 2025-02-19 | Orc's Lair (The Amstrad Games Book) | Pitman Publishing | 1984 |
| 2020-05-12 | Orb Quest | WOW Software | 1990 |
| 2023-09-10 | OPQA vs. QAOP: The Final Battle (5th CPCRetroDev 2018) | | 2018 |
| 2023-02-12 | Operation Wolf (version Magnum Lightphaser) | Ocean | 1988 |
| 2014-12-23 | Operation Wolf: Plusedition | Ocean | 20xx |
| 2023-02-12 | Operation Wolf | Ocean | 1988 |
| 2025-07-21 | Operation Thunderbolt (GX4000) | Ocean | 1990 |
| 2025-07-21 | Operation Thunderbolt | Ocean | 1989 |
| 2019-01-08 | Operation Program Cleaner | | 1991 |
| 2012-08-25 | Operation Hormuz | Again Again | 1989 |
| 2024-03-30 | Operation Hanoi | Players | 1990 |
| 2018-10-15 | Operation Gunship | Codemasters | 1989 |
| 2020-09-18 | Operation Desert Storm | | 1995 |
| 2025-02-23 | Operation Colossus | Argus Press | 1985 |
| 2021-06-05 | Operation Barbarossa | Strategy Software | 1989 |
| 2023-07-09 | Operation Alexandra (1st CPCRetroDev 2018) | 4Mhz | 2018 |
| 2021-06-01 | Open Tower Defense | Resistance | 2021 |
| 2014-06-07 | One-on-one | Ariolasoft | 1985 |
| 2023-11-02 | One Wonder (CPCRetroDev 2023) | | 2023 |
| 2025-03-22 | One Man and His Droid | Mastertronic | 1985 |
| 2024-09-13 | One | Epyx / D3M Software | 1986 |
| 2014-06-05 | Once a Knight is Enough | Amster Productions | 1991 |
| 2016-04-15 | On the Run | Firebird / Silverbird | 1985 |
| 2024-06-15 | On the Oche | Artic Computing | 1984 |
| 2024-07-01 | On the Bench | Cult | 1988 |
| 2024-03-10 | On Cue | Mastertronic | 1987 |
| 2021-08-06 | Omeganea | Compute Mit | 1986/1987 |
| 2016-12-21 | Olympiad '86 | Atlantis Software | 1986 |
| 2025-02-25 | Olli And Lissa: The Ghost of Shilmoore Castle | Firebird | 1987 |
| 2014-07-18 | Olli And Lissa 3: The Candlelight Adventure | Codemasters | 1989 |
| 2020-02-19 | Oliver Rand | Interface Publications | 1985 |
| 2021-04-23 | Old West | | 2021 |
| 2014-03-25 | Old Scores | Global Software | 1986 |
| 2024-06-10 | Old Sam's Saloon Gamble Machine | | 1989 |
| 2024-07-06 | Oink! | CRL / Alternative | 1987 |
| 2024-03-13 | Oilmania | Dreamsoft | 1990 |
| 2020-06-15 | OIK | Computer Partner | 1988/1989 |
| 2022-10-30 | OH NO, My Moustache! | Strawberry Studio | 2022 |
| 2025-03-14 | Oh Mummy
Oh Momies!
Schatz der Pharaonen | Amsoft | 1984 |
| 2025-11-06 | Oh Mummy Resurrected | | 1984/2025 |
| 2024-03-19 | Oh Chute! | Team Giraffe | 2024 |
| 2021-12-19 | Off Shore Warrior | Titus | 1989 |
| 2020-07-17 | Odds | Computing With The Amstrad | 1985 |
| 2023-12-04 | Odd One Out (Amstrad Computer User) | Amstrad Computer User | 19xx |
| 2023-09-14 | Octopus GX4000 | CPC-POWER / Team Galaxy | 2023 |
| 2023-09-14 | Octopus Deluxe | CPC-POWER / Team Galaxy | 2023 |
| 2023-11-30 | Octopus 21 | GGP Amstrad | 2023 |
| 2023-09-14 | Octopus | GGP Amstrad | 2021 |
| 2018-10-06 | Octoplex | Mastertronic | 1989 |
| 2015-05-28 | Oceano | | 2015 |
| 2014-07-30 | Ocean Conqueror | Rack-It | 1988 |
| 2021-09-09 | Obstacle (Amstrad Games Book) | Beam Software / Melbourne House | 1985 |
| 2024-06-12 | Obsidian
L'hepiss | Artic Computing | 1985 |
| 2018-10-12 | Obliterator | Melbourne House / Psygnosis | 1989 |
| 2017-04-03 | Oberon 69 | Diabolic / G.LL Software | 1990 |
| 2022-12-04 | O Grady Says | | 1984 |
| 2019-06-02 | Nythyhel: Files of the Occult | 50-50 Club / Pegasus Software | 1986 |
| 2015-11-02 | NWO (27th @ CPCRetroDev 2015) | Gamestorming | 2015 |
| 2013-08-14 | Numbers Up | Your Computer | 1986 |
| 2023-12-04 | Numbercircle | Amstrad Computer User | 1990 |
| 2023-12-10 | NumberBlaster (Amstrad Action) | Amstrad Action | 1991 |
| 2023-04-02 | Number Swop / Puzzle (Popular Computing Weekly) | Popular Computing Weekly | 1984 |
| 2023-12-12 | Number Shooter (Amstrad Action) | Amstrad Action | 1993 |
| 2023-12-04 | Number Series | Amstrad Computer User | 1990 |
| 2023-12-11 | Number Scoffer (Amstrad Action) | Amstrad Action | 1992/1993 |
| 2025-06-25 | Number Painter | Ask Software | 1984 |
| 2019-12-08 | Number game | Amstrad Action | 1987 |
| 2013-03-03 | Number 11
Sum Fun | Camel | 198x |
| 2015-12-31 | Number 1 | Ocean / Bug-byte Software / Amstrad Action | 1985 |
| 2023-11-05 | Nuke Bug (CPCRetroDev 2023) | Alakran Studio | 2023 |
| 2018-05-22 | Nuclear Heist | Players | 1986 |
| 2013-10-01 | Nuclear Defence | Amsoft | 1986 |
| 2019-06-04 | Nova! | Incentive Software | 1987 |
| 2024-08-05 | Nova Race | Chunky Panda | 2022 |
| 2025-02-20 | Noughts and Crosses (Computer Challenges for the Amstrad) | Duckworth | 1985 |
| 2022-08-17 | Noughts And Crosses (Disk 50) | Cascade Games | 1986 |
| 2023-12-03 | Noughts and Crosses | Amstrad Computer User | 1992 |
| 2018-08-15 | Noughts and Crosses | Pan Books | 1984 |
| 2020-09-03 | Not the Scorpions | | 2020 |
| 2021-02-20 | Not a Penny More, Not a Penny Less | Domark | 1987 |
| 2022-01-15 | Nosferatu the Vampyre
Nosferatu El Vampiro | CRL / Pyranha / Macmillan | 1986 |
| 2017-03-31 | Nosferatu | | 1982/2017 |
| 2023-04-03 | North Star | Gremlin Graphics | 1988 |
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