| Alisa's Quest | Gabriel Dinu | Super Mario Bros. | Action > Platformer | NES | G, L, T | Complete | 1.0a | 18 Sep 2020 |
| Aliens (FDS) Fix Hack | lancuster | Aliens: Alien 2 | Action > Platformer | FDS | G, L | Improvement | 1.0 | 29 Dec 2017 |
| 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 |
| Alien Resurrection: New control buttons config | Mr2 | Alien Resurrection | Action > Shooter | PSX | GP | Improvement | 0.1 | 18 Oct 2016 |
| 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 Plus | the jabu | Alien 3 | Action | NES | G, T, GP | Improvement | 1.0 | 20 Dec 2015 |
| Alien 3 Easy | chronix | Alien 3 | Action | NES | GP | Improvement | 1.0 | 23 Jul 2022 |
| Alien 3 - Vision Hack | Guyver (X.B.M.) | Alien 3 | Action | NES | GP | Improvement | 1.0 | 12 Jul 2016 |
| Alien 3 - Survivor mod | Vikfield | Alien 3 | Action > Platformer | GEN | T, GP | Improvement | 1.0 | 26 Aug 2018 |
| Alien 3 - Kinoppi version | Vikfield | Alien 3 | Action > Platformer | GEN | T, GP | Improvement | 1.0 | 04 Nov 2018 |
| Alice de Climber | DASTARD | Ice Climber | Action > Platformer | NES | G, T | Improvement | 1.0 | 01 Sep 2007 |
| ALF Escapes! | pacnsacdave | The Blues Brothers | Action > Platformer | NES | G, T | Complete | 1.0 | 06 Mar 2016 |
| Alex Kidd in Radaxian Rumble | Alianger | Alex Kidd in Miracle World | Action > Platformer | SMS | G, S, L, T, GP | Complete | 1.03d | 21 Oct 2015 |
| Alex Kidd in Miracle World - reverse controls | Calindro | Alex Kidd in Miracle World | Action > Platformer | SMS | GP | Improvement | 1.0 | 23 Oct 2016 |
| Alex Kidd in Miracle World - burger and more | micky | Alex Kidd in Miracle World | Action > Platformer | SMS | G | Improvement | 1.0 | 03 Aug 2017 |
| Alex Kidd - The Lost Stars :Stella Edition | poody | Alex Kidd: The Lost Stars | Action > Platformer | SMS | G | Improvement | 1.0 | 16 May 2023 |
| Alex Kidd - Fall Of Radaxian | TheSegaGuru | Alex Kidd in Miracle World | Action > Platformer | SMS | G, L, T, O | Complete | 1.01 | 28 Jul 2016 |
| Alcon Special | DUSTINODELLOFFICIAL | Slap Fight MD | Action > Shooter | GEN | G, T, O | Improvement | 1.0 | 20 Oct 2018 |
