| Getsu Fuuma Den EasyType | Mentil | Getsu Fuuma Den | Action > Platformer | NES | GP | Improvement | 1.0 | 14 Mar 2022 |
| Gex The Gecko in Sonic 1 | JoenickROS | Sonic the Hedgehog | Action > Platformer | GEN | G, S, L, T, GP | Complete | 1.0 | 26 Oct 2020 |
| GFF (Grond's Final Fantasy) | Grond | Final Fantasy | Role Playing | NES | G, S, L, T, GP, O | Improvement | 3.22 | 07 Sep 2013 |
| Ghost eye restoration | samus12345 | Pac-Man Championship Edition | Action | NES | G | Improvement | 1.0 | 22 Jun 2020 |
| Ghostbusters (SMS Edition) | pacnsacdave | Ghostbusters | Action | NES | G, GP, O | Improvement | 1.0 | 25 Dec 2015 |
| Ghostbusters Remastered (The Real) | Nesrocks | Ghostbusters | Action | NES | G, S, L, T, GP | Complete | 1.1 | 12 Oct 2019 |
| Ghosts 'n Goblins Proofread | Mister Xiado | Ghosts 'n Goblins | Action > Platformer | NES | T | Improvement | 1.0 | 30 Jul 2018 |
| Ghosts'n Goblins - All Hallows Eve | Plimoth League | Ghosts 'n Goblins | Action > Platformer | NES | L | Complete | 1.0 | 30 Oct 2001 |
| Ghosts'N Goblins Easy | chronix | Ghosts 'n Goblins | Action > Platformer | NES | GP | Improvement | 2.0 | 14 Apr 2019 |
| Ghosts'n Goblins MMC3 Patch | RetroRain | Ghosts 'n Goblins | Action > Platformer | NES | O | Improvement | 1.0 | 15 Jan 2014 |
| Ghosts'n Goblins Restoration | SCD | Ghosts 'n Goblins | Action > Platformer | NES | G, T | Improvement | Final | 09 Dec 2019 |
| Ghouls n' Ghosts SRAM | BillyTime! Games | Ghouls 'n Ghosts | Action > Platformer | GEN | O | Improvement | 1.1 | 16 Nov 2022 |
| Giant Mario Bros. | N·K | Super Mario Bros. | Action > Platformer | NES | G, L, GP | Improvement | 1.2 | 08 Dec 2021 |
| Gigas Bosses Disassemble Less Often | Kethinov | Secret of Mana | Role Playing > Action RPG | SNES | GP | Improvement | 1.1 | 02 Jan 2020 |
| Gimmick! - Fixed Samples | TakuikaNinja | Mr. Gimmick | Action > Platformer | NES | S | Bug Fix | 1.0 | 29 May 2022 |
| Gimmick! Easy Hack | MisterGimmick | Mr. Gimmick | Action > Platformer | NES | GP | Improvement | 1.0 | 08 Aug 2020 |
| Gimmick! More than a simple toy | lancuster | Mr. Gimmick | Action > Platformer | NES | L, T, O | Improvement | 1.0 | 19 Dec 2015 |
| Gimmick! Quality-of-Life Mod | SadColor | Mr. Gimmick | Action > Platformer | NES | GP | Improvement | 1.0 | 22 Sep 2022 |
| Girl Dream-Topia (SMB1 Hack) | THE UNGGOY | Super Mario Bros. | Action > Platformer | NES | G, S, L, T, GP | Complete | 1.0 | 07 Feb 2018 |
| Girl Team to the Rescue (Chip & Dale Gadget) | Zus | Disney's Chip 'n Dale: Rescue Rangers | Action > Platformer | NES | G, T | Improvement | 0.2 | 20 Oct 2016 |
