| Astérix & The Great Rescue SMS Full Pass | Emulacion sin secretos | Astérix & The Great Rescue | Action > Platformer | SMS | O | Improvement | 1.0 | 30 Nov 2019 |
| Astroblast (Rainbow Brite Mod) | eskayelle | Astroblast | Action > Shooter | 2600 | G, L | Improvement | v2 | 19 Jan 2020 |
| Astroblast (Slow & Steady Mod) | eskayelle | Astroblast | Action > Shooter | 2600 | G, L | Improvement | 1.0 | 19 Jan 2020 |
| Astroblast Romhack Two-Pack! | eskayelle | Astroblast | Action > Shooter | 2600 | L, GP | Improvement | 1.0 | 11 Jan 2020 |
| Astyanax - The Movie | Flake | Astyanax | Action > Platformer | NES | G, T | Improvement | 1.0 | 16 Jan 2013 |
| Astyanax Remix | Googie | Astyanax | Action > Platformer | NES | G, L, T | Complete | 1.0 | 14 Jul 2006 |
| Asuka 120% Limit Over | CafeBreak Project | Asuka 120% Limited: Burning Fest. | Action > Fighting | SAT | GP, O | Improvement | 2.1 | 31 Dec 1998 |
| Asuka 120% Limit Over - easy patch | SCO | Asuka 120% Limited: Burning Fest. | Action > Fighting | SAT | GP | Addendum | 1.0 | 19 Apr 2018 |
| Asuka 120% Limit Over - English patch | Ms. Tea | Asuka 120% Limited: Burning Fest. | Action > Fighting | SAT | G, T, GP, O | Addendum | 1.0 | 21 Jun 2015 |
| Atari Man II | Megafield64 | Mega Man 2 | Action > Platformer | NES | G | Improvement | 1.0 | 20 Jan 2014 |
| Atari Man III | Megafield64 | Mega Man 3 | Action > Platformer | NES | G | Improvement | 2.0 | 18 Jan 2017 |
| Atari Pitfall for SNES | Nokia3310 | Pitfall: The Mayan Adventure (SNES) | Action > Platformer | SNES | O | Improvement | 1.0 | 02 Jan 2022 |
| Atlan Cirno Nazo | DASTARD | Atlantis no Nazo | Action > Platformer | NES | G | Improvement | 1.0 | 01 Apr 2009 |
| ATP Tour Championship Tennis 2022 | TA_Marcos_Translations | ATP Tour Championship Tennis | Sports | GEN | G, S, T, O | Improvement | 1.0 | 01 Jan 2022 |
| Auction Chocobo Fix | Madsiur | Final Fantasy III | Role Playing | SNES | G | Bug Fix | 1.1 | 25 Oct 2016 |
| Auction Chocobo Fix | Madsiur | Final Fantasy VI Advance | Role Playing | GBA | G | Bug Fix | 1.1 | 27 Oct 2016 |
| Aussie Rules 2020 | Headfram | Aussie Rules Footy | Sports | NES | G, T | Improvement | 1.2 | 23 Jun 2020 |
| Auto Card and Auto Truth Gas | magus | Snake's Revenge | Action Adventure | NES | GP | Improvement | 1.0 | 20 Dec 2018 |
| Autobot Bros. | Grimlick | Super Mario Bros. | Action > Platformer | NES | G, T | Improvement | 1.0 | 14 Jul 1997 |
| Automap Plus | snarfblam | The Legend of Zelda | Action Adventure | NES | O | Improvement | 0.2 | 13 Aug 2011 |
