| Dragon Warrior Monsters 2: All monsters | bcrobert | Dragon Warrior Monsters 2: Cobi's Journey | Role Playing | GB | GP | Improvement | 1.0 | 06 Feb 2014 |
| Dragon's Lair - Completely Playable | lancuster | Dragon's Lair | Action Adventure | NES | G, L, O | Addendum | 1.1 | 11 Jan 2017 |
| Dragon's Lair improvement | the jabu | Dragon's Lair | Action Adventure | NES | GP, O | Improvement | 1.0 | 22 Jun 2015 |
| Dragonball - Dragon's Mystery (Upgraded) | pacnsacdave | Dragon Power | Adventure | NES | G, T, O | Complete | 1.0 | 30 Aug 2020 |
| Dragoner/Dragon Master Fix | red_bird | Ogre Battle: The March of the Black Queen | Strategy > Turn Based | SNES | GP | Improvement | 1.0 | 30 Dec 2008 |
| Dragoon X | Sliver X | Dragon Warrior | Role Playing | NES | G, L, T, GP | Complete | Final | 26 Dec 1998 |
| Dragoon X Omega - Gold Edition | Sliver X | Dragon Warrior | Role Playing | NES | G, S, L, T, GP | Complete | 2.0f | 20 Jan 2003 |
| Dragoon X Omega I Gold Edition - Amnethen Apocalypse | obscurumlux01 | Dragon Warrior | Role Playing | NES | G, GP, O | Addendum | 2.0 | 29 Sep 2015 |
| Dragoon X Omega II | Sliver X | Final Fantasy | Role Playing | NES | G, S, L, T, GP | Complete | Final 2 | 17 Jun 2008 |
| Dragoon X Omega II - Easy Mode | obscurumlux01 | Final Fantasy | Role Playing | NES | GP | Addendum | 1.0 | 16 Sep 2015 |
| Dream Mario Bros. | TheSuperShow | Super Mario Bros. | Action > Platformer | NES | G, T | Improvement | 1.2 | 04 Feb 2017 |
| Dream World Pogie Revival | Dizzy9 | Dreamworld Pogie | Action > Platformer | NES | G, S, L, T, GP, O | Improvement | 0.05 | 03 Jun 2012 |
| Driver 2 - Back on the Streets: Control modification | Mr2 | Driver 2 | Racing | PSX | GP | Improvement | 0.1 | 26 Feb 2015 |
| Drop Table Balance | Kethinov | Secret of Mana | Role Playing > Action RPG | SNES | GP | Improvement | 1.1 | 07 Jul 2019 |
| DTE fixer upper, part deux | Lenophis | Final Fantasy II | Role Playing | NES | O | Improvement | 1.0 | 15 Dec 2009 |
| Duck Hunt - Moon Walk | Guyver (X.B.M.) | Duck Hunt | Action > Shooter | NES | G, S, T, O | Complete | 1.0 | 18 Oct 2011 |
| Duck Hunt VS (NES-patch) | Morgan Johansson | Duck Hunt (VS) | Sports | ARC | O | Improvement | 1.61 | 04 May 2013 |
| Duck Tales - Revision | Lomax | DuckTales | Action > Platformer | NES | L | Complete | 1.0 | 26 Oct 2013 |
| Duck Tales 2 Deluxe 2013 | Ti | DuckTales 2 | Action > Platformer | NES | L | Complete | 1.0 | 02 Dec 2013 |
| Duck Tales 2 New Journey | MechanicCDRR | DuckTales 2 | Action > Platformer | NES | L | Complete | 1.1 | 13 Feb 2020 |
