| “JUSTIN BAILEY” patch | Auximines | Super Metroid | Action Adventure | SNES | G | Improvement | 0.99b | 12 Dec 2007 |
| “Flat” Lethal Lava Land | Messiaen | Super Mario 64 | Action > Platformer | N64 | L | Improvement | 0.2 | 18 Jul 2008 |
| Rhyme Rider Kerorican - Audio Cues | DanielKan | Rhyme Rider Kerorican | Other | WS | S | Improvement | 1.0 | 09 Dec 2020 |
| [GBA] Zelda: Link to the Past - Between Worlds voices | Weario | The Legend of Zelda: A Link to the Past and Four Swords | Role Playing > Action RPG | GBA | S | Improvement | 1.0 | 11 Jun 2019 |
| Zozo Sign Petty Fix | Madsiur | Final Fantasy III | Role Playing | SNES | G | Bug Fix | 1.0 | 21 Oct 2016 |
| Zombies Ate My Neighbors: Dr Tongue's Revenge | Skylar Brock | Zombies Ate My Neighbors | Action | SNES | L | Complete | 2.0 | 08 Jun 2017 |
| Zombies Ate My Neighbors: Bloody Disgusting Edition | Board_Avenger | Zombies Ate My Neighbors | Action | SNES | G | Improvement | 1.0 | 05 Jan 2019 |
| Zombies Ate my Neighbors Orange Juice | zefennekinfan | Zombies Ate My Neighbors | Action | SNES | G, S, L, T, GP, O | Complete | 1.0 | 12 Jan 2021 |
| Zombies Ate My Neighbors - The Sequel | Droter | Zombies Ate My Neighbors | Action | SNES | G, L, T, GP, O | Complete | 1.1 | 02 Sep 2017 |
| Zombie/Tapir | Leet Sketcher | Final Fantasy III | Role Playing | SNES | GP | Bug Fix | 1.2 | 03 Mar 2018 |
| Zombie/Rippler | Leet Sketcher | Final Fantasy III | Role Playing | SNES | GP | Bug Fix | 1.2 | 03 Mar 2018 |
| Zombie Hunter Bug Fix | KingMike's Translations | Zombie Hunter | Role Playing > Action RPG | NES | GP | Bug Fix | 1.0 | 31 Jan 2006 |
| Zippy Race - Sega SG-1000 to MSX conversion | hap | Zippy Race | Racing | SG1K | GP | Complete | 1.0 | 23 Jan 2007 |
| Zillion Slight Improvement | Johnny | Zillion | Action | SMS | T | Improvement | 1.0 | 30 Dec 2011 |
| Zettai Muteki Raijin-Oh - Continue Hack (J / E) | blackdrake | Zettai Muteki Raijin-Oh | Action > Fighting | GB | GP | Improvement | 1.0 | 23 Jul 2009 |
| Zero Wing (Europe) 60Hz NTSC patch | bigboo | Zero Wing | Action > Shooter | GEN | O | Improvement | 1.0 | 18 Jun 2017 |
| Zero Tolerance - Snake | Priboi | Zero Tolerance | Action | GEN | L | Complete | 1.0 | 10 Nov 2009 |
| Zero Tolerance - Labyrinth Death | Priboi | Zero Tolerance | Action | GEN | L | Complete | 1.0 | 10 Nov 2009 |
| Zero Stance | ThegreatBen | Mega Man X3 | Action > Platformer | SNES | G | Improvement | 1.0 | 01 Mar 2017 |
| Zero Saber | Docrow | Mega Man X3 | Action > Platformer | SNES | GP, O | Addendum | 1.1 | 09 Jul 2017 |
