| Alien 3 - Survivor mod | Vikfield | Alien 3 | Action > Platformer | GEN | T, GP | Improvement | 1.0 | 26 Aug 2018 |
| Alien 3: Assembly Cut | advancedpillow | Alien 3 | Action > Platformer | SNES | GP, O | Improvement | 1.0 | 22 May 2019 |
| Alien 3 SRAM | BillyTime! Games | Alien 3 | Action > Platformer | GEN | O | Improvement | 1.1 | 27 Apr 2021 |
| Alien 3 - Vision Hack | Guyver (X.B.M.) | Alien 3 | Action | NES | GP | Improvement | 1.0 | 12 Jul 2016 |
| Alien Resurrection: New control buttons config | Mr2 | Alien Resurrection | Action > Shooter | PSX | GP | Improvement | 0.1 | 18 Oct 2016 |
| Alien Soldier Ammo Regen | BillyTime! Games | Alien Soldier | Action | GEN | GP | Improvement | 1.0 | 26 Jun 2022 |
| Alien Soldier (Europe) 60 Hz Region-Free | Adam Catalyst | Alien Soldier | Action | GEN | O | Improvement | 2.0 | 23 Dec 2022 |
| Rick and Morty + Skin colour fix | Crying Onion | Alien Syndrome | Action > Shooter | NES | G | Improvement | 1.1 | 06 May 2018 |
| Aliens (FDS) Fix Hack | lancuster | Aliens: Alien 2 | Action > Platformer | FDS | G, L | Improvement | 1.0 | 29 Dec 2017 |
| All Night Nippon: Restore original Spiny behavior | ZeroShift | All Night Nippon Super Mario Bros. | Action > Platformer | FDS | GP | Bug Fix | 1.0 | 21 Mar 2019 |
| All Night Nippon Super Mario Bros. Classic | Hacker65xx | All Night Nippon Super Mario Bros. | Action > Platformer | FDS | G | Improvement | 1.0 | 16 Apr 2022 |
| Alleyway DX | MojoDodo | Alleyway | Puzzle | GB | G, L, GP, O | Complete | 1.0 | 15 Jan 2022 |
| Alleyway Highscore Save | Alex-iG | Alleyway | Puzzle | GB | O | Improvement | 1.0 | 11 Oct 2019 |
| Altered Beast - Alternate Style | Pyron | Altered Beast | Action > Beat 'Em Up | GEN | G | Improvement | 2.0 | 15 Nov 2015 |
| Altered Beast with Arcade Voice Samples | Linkuei | Altered Beast | Action > Beat 'Em Up | GEN | S | Improvement | 1.0 | 21 Jan 2016 |
| Altered Space - Wave channel fix | DevEd | Altered Space: A 3-D Alien Adventure | Puzzle | GB | S | Improvement | 1.0 | 01 Mar 2018 |
| Alundra Enemy Stat Restoration | Supper | Alundra | Action Adventure | PSX | GP | Improvement | v1 | 06 Mar 2022 |
| Amazing Penguin DX | marc_max | Amazing Penguin | Action | GB | G | Improvement | 1.0 | 03 May 2022 |
| American Gladiators MMC1 to MMC3 | BZK | American Gladiators | Sports | NES | O | Improvement | 001 | 03 Nov 2016 |
| Animal Crossing: Wild World - Singleplayer Nookington's | SporyTike | Animal Crossing: Wild World | Simulation | NDS | O | Improvement | 1.1.1 | 10 Aug 2022 |
