| Atlan Cirno Nazo | DASTARD | Atlantis no Nazo | Action > Platformer | NES | G | Improvement | 1.0 | 01 Apr 2009 |
| 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 | MagusLOGS | 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 |
| Automatic Healing | HatZen08 | Final Fantasy III | Role Playing | SNES | GP | Improvement | 1.0 | 02 Mar 2013 |
| Automatic Sprint and Learning | Tzepish | Final Fantasy V | Role Playing | SNES | GP | Improvement | 1.0 | 19 Nov 2017 |
| AVGN VS Dr. Wily | ABOhiccups | Mega Man 2 | Action > Platformer | NES | G, L, T | Complete | 1.2 | 05 Dec 2011 |
| AVGN VS Ganon | ABOhiccups | The Legend of Zelda: A Link to the Past | Action Adventure | SNES | G, S, T, GP | Complete | 1.4 | 08 Apr 2020 |
| Axnfanatics F-Zero | Axnfanatic | F-Zero | Racing | SNES | L | Complete | 1.0 | 26 Jan 2013 |
| Ayrton Senna Name Patch (ft. Jean Alesi) | FMecha | Super F1 Circus 2 | Racing | SNES | T | Improvement | 1.0a | 30 Oct 2020 |
| Ayrton Senna's Super Monaco GP II '91 Season | CorukoBardo | Ayrton Senna's Super Monaco GP II | Racing | GEN | T | Improvement | 1.0 | 14 Oct 2011 |
| Ayrton Senna's Super Monaco GP II - Complete 1991 Season | tag2015 | Ayrton Senna's Super Monaco GP II | Racing | GEN | G, T | Improvement | 2.0 | 22 Mar 2014 |
| B-Button Dash | A.D.R.I.A.N | Final Fantasy III | Role Playing | NES | GP | Improvement | 1.0 | 18 Feb 2017 |
| B-Wings Unlimited Morphs | doomguard | B-Wings | Action > Shooter | NES | O | Improvement | 1.0 | 26 Nov 2015 |
| Back From The Source | Griever | Battle City | Action | NES | L, GP | Complete | 1.0 | 01 Jan 2008 |
| Back to the Future (Enhanced) | pacnsacdave | Back to the Future | Action | NES | G, S, T, GP | Improvement | 1.1 | 18 Apr 2020 |
| Back to the Future (Music Fix) | pacnsacdave | Back to the Future | Action | NES | S | Improvement | 1.0 | 18 Apr 2020 |
