| Funny Princess | Ultimessiah | Super Mario Bros. | Action > Platformer | NES | G, L, T, GP | Complete | 1.0 | 01 Jan 2007 |
| Funny Princess Sprite Fix | Zynk Oxhyde | Super Mario Bros. | Action > Platformer | NES | G | Addendum | 1.0 | 13 Oct 2022 |
| Fusion Twisted Hockey | DANGER X | Ike Ike! Nekketsu Hockey Bu: Subette Koronde Dairantou | Sports | NES | G, L, T, O | Improvement | 2.0 | 13 May 2015 |
| Future Tank | Yanshan Software | Battle City | Action | NES | G, L | Complete | 1.0 | 01 Jan 2001 |
| G.O.D Easy Mode | mteam | G.O.D.: Mezameyo to Yobu Koe ga Kikoe | Role Playing | SNES | GP | Improvement | 1.00 | 12 Sep 2022 |
| G5 Building | SubDrag | GoldenEye 007 | Action > Shooter | N64 | G, L | Complete | 1.0 | 28 Apr 2007 |
| Gacha Hack | LeonarthCG | Fire Emblem: The Sacred Stones | Strategy > Turn Based | GBA | G, S, O | Complete | 1.0 | 20 Mar 2019 |
| Gadien's Spring Cleaning | Jabem | Super Mario Bros. 3 | Action > Platformer | NES | L, GP | Complete | 1.0 | 16 Nov 2021 |
| Gaia's Navel With the Girl Without Doubling Back | Kethinov | Secret of Mana | Role Playing > Action RPG | SNES | GP | Improvement | 1.1 | 15 Mar 2019 |
| Gaiares Redux | BillyTime! Games | Gaiares | Action > Shooter | GEN | GP, O | Improvement | 1.0 | 04 May 2022 |
| Galaga & Galaxian DX | MojoDodo | Arcade Classic No. 3: Galaga / Galaxian | Action > Shooter | GB | G | Improvement | 1.1 | 26 Jan 2022 |
| Galaga - Space Invaders Hack | Datchy | Galaga | Action > Shooter | NES | G | Improvement | 1.0 | 15 Aug 2022 |
| Galaga - Title Mod | Makimura Manufacturing | Galaga | Action > Shooter | NES | G, O | Improvement | 1.0 | 07 Jul 2012 |
| Galaga Title Screen | gzip | Galaga | Action > Shooter | NES | G | Improvement | 1.0 | 01 Sep 2022 |
| GALAGA: MARIOGA Edition | Hammer☆Keyboard☆Studios | Galaga | Action > Shooter | NES | G, T | Complete | 1.0 | 23 Aug 2021 |
| Galaxian Arcade | 125scratch | Galaxian | Action > Shooter | NES | G | Improvement | 1.0 | 20 May 2019 |
| Galaxian Enhanced | Timelord | Galaxian | Action > Shooter | NES | G, T, GP | Improvement | 1.0 | 02 Jan 2016 |
| Galaxian Title Screen | gzip | Galaxian | Action > Shooter | NES | G | Improvement | 1.0 | 01 Sep 2022 |
| Galaxian: Liquid mod | Lomax | Galaxian | Action > Shooter | NES | GP | Improvement | 0.1 | 05 Jul 2018 |
| Galaxy 5000 (U) (2P Hack) | Shredder | Galaxy 5000: Racing in the 51st Century | Racing | NES | O | Improvement | 1.0 | 23 May 2015 |
