| Deceiver Dome | LazySheller | Super Mario RPG: Legend of the Seven Stars | Role Playing | SNES | L, T, GP | Complete | 1.0 | 21 Jun 2009 |
| Deep in Space 2 | CAndiman | Tetris | Puzzle | NES | G, L | Improvement | 1.0 | 19 Feb 2023 |
| Defender Fix | Deathlike2 | Final Fantasy IV Advance | Role Playing | GBA | GP | Bug Fix | 1.0a | 14 Dec 2008 |
| Deflower | pacnsacdave | Lode Runner | Puzzle | NES | G, T | Complete | 1.0 | 31 Jul 2016 |
| Deja Vu - Uncensored | Жукороп | Deja Vu | Adventure | NES | G | Improvement | 1.0 | 15 Apr 2021 |
| Deletable HMs | Vortiene | Pokémon: Blue Version | Role Playing | GB | GP | Improvement | 1.0 | 27 Sep 2021 |
| Della Ducktales | Garrett Gilchrist | DuckTales | Action > Platformer | NES | G, T, O | Complete | 1.0 | 23 Apr 2022 |
| Delocalisation & Restoration of Final Fantasy Legend II to SaGa 2 | Tharthan | Final Fantasy Legend II | Role Playing | GB | G, T | Improvement | 1.0 | 14 Nov 2010 |
| Deltarune 60FPS Hack | LivelyZephyrs | Deltarune Chapter 1 | Role Playing > Action RPG | PC | G | Improvement | 1.00 | 05 Oct 2019 |
| Delthea's Bizarre Dream Adventures | error4 | Fire Emblem: The Sacred Stones | Strategy > Turn Based | GBA | G, S, GP | Improvement | 1.0 | 12 Feb 2022 |
| Demolition Man SRAM | BillyTime! Games | Demolition Man | Action | GEN | O | Improvement | 1.0 | 18 Jan 2022 |
| Demonbike 2 | DANGER X | Excitebike | Racing | NES | G, L, GP | Complete | 1.0 | 29 Jan 2016 |
| Dennis The Menace Redux | BillyTime! Games | Dennis The Menace | Action > Platformer | SNES | L, GP, O | Improvement | 1.0 | 11 Feb 2022 |
| Derby Stallion 64 Prototype Corrective Patch | Zoinkity | Derby Stallion 64 | Sports | N64 | O | Bug Fix | 1.0 | 28 Sep 2021 |
| Description Disruption | SilentEnigma | Final Fantasy III | Role Playing | SNES | O | Bug Fix | 1.2 | 01 Mar 2021 |
| Desert Strike - Apache Upgrade | Vikfield | Desert Strike: Return to the Gulf | Action > Shooter | GEN | T, GP | Improvement | 1.0 | 12 Nov 2020 |
| Desert Strike SRAM | BillyTime! Games | Desert Strike: Return to the Gulf | Action > Shooter | GEN | O | Improvement | 1.0 | 13 Feb 2021 |
| Destroy 1 | Inventor | Wrecking Crew | Action > Platformer | NES | G | Improvement | 1.0 | 01 Jan 2000 |
| Devil Bros. | Pikachumanson | Mario Bros. | Action > Platformer | NES | G, T | Improvement | 1.0 | 20 May 2013 |
| Devil Crash Alternate Style | Pyron | Dragon's Fury | Other | GEN | G | Improvement | 1.0 | 03 Aug 2017 |
