| Assassins Creed Gaiden | Dom Jurumela | Ninja Gaiden | Action > Platformer | NES | G | Improvement | 1.0 | 03 Feb 2018 |
| Asriel Dreemurr in Castlevania: Order of Ecclesia | ColinBun | Castlevania: Order of Ecclesia | Role Playing > Action RPG | NDS | G, S, T | Improvement | 1.1 | 03 Apr 2023 |
| ASM Machina | OEA | Pokémon: Red Version | Role Playing | GB | T, GP | Improvement | 1.5.1 | 11 Oct 2021 |
| ASCII Boxes | HarvettFox96 | Magic Jewelry | Puzzle | NES | G, T, O | Improvement | 20200219.1 | 19 Feb 2020 |
| Artea Name Fix Patch | Relnqshd | Lufia II: Rise of the Sinistrals | Role Playing | SNES | T | Bug Fix | 1.0 | 17 Jul 2004 |
| Art of Fighting Upgrade | BillyTime! Games | Art of Fighting | Action > Fighting | GEN | GP, O | Improvement | 1.0 | 18 Sep 2023 |
| Art of Fighting - Enhanced Colors | Pyron | Art of Fighting | Action > Fighting | GEN | G | Improvement | 1.0 | 08 May 2015 |
| Art Accurate Link & Zelda | KeKeffect | The Legend of Zelda: A Link to the Past | Action Adventure | SNES | G | Improvement | 1.0 | 23 Apr 2022 |
| Arn's Winter Quest: Gway Edition | Toby "Radiation" Fox | EarthBound | Role Playing | SNES | G, S, L, T | Complete | 1.02 | 01 Jan 2006 |
| Armorines: New control buttons config | Mr2 | Armorines: Project S.W.A.R.M. | Action > Shooter | PSX | GP | Improvement | 0.1 | 04 Dec 2018 |
| Armored Core: Last Raven H+ | acemon33 | Armored Core: Last Raven | Simulation | PS2 | GP | Improvement | 0.2 | 08 May 2023 |
| Arkanoij | Superjustinbros | Arkanoid | Action | NES | G | Improvement | 1.0 | 21 May 2014 |
| Arkanoid Revised | Nesrocks | Arkanoid | Action | NES | G, GP, O | Complete | 1.03 | 06 Sep 2017 |
| Arkanoid Reblocked | Svambo | Arkanoid: Doh It Again | Action | SNES | G, L, T | Complete | 1.0 | 15 Nov 2020 |
| Arkanoid II Password | chronix | Arkanoid II | Action | NES | GP | Improvement | 1.0 | 25 Sep 2018 |
| Arkanoid Atarisized | Megafield64 | Arkanoid | Action | NES | G | Improvement | 1.0 | 15 Jan 2014 |
| Arkanoid After Dark | Superjustinbros | Arkanoid | Action | NES | G | Improvement | 1.0 | 21 May 2014 |
| Arkanoid 2 NES Vaus support | lidnariq | Arkanoid II | Action | NES | O | Improvement | 20161222 | 12 Dec 2016 |
| Arkanoid 11 | Bloodstar | Arkanoid | Action | NES | L | Complete | 1.0 | 01 Jan 2000 |
| Arkanoid - Wall Crash Conversion | Superjustinbros | Arkanoid | Action | NES | G, L | Complete | 1.0 | 21 May 2014 |
