| McDonald's Treasure Land Adventure Restoration | SCD | McDonald's Treasure Land Adventure | Action > Platformer | GEN | G | Improvement | Final | 03 Jul 2017 |
| MDbtroid | Infinity's End | Metroid | Action Adventure | NES | G, T, GP | Improvement | 1.0 | 15 Aug 2012 |
| Medicine Pop | DASTARD | Chack'n Pop | Action > Platformer | NES | G, T | Improvement | 1.0 | 01 Jul 2009 |
| Medicine Power-up Patch | Phoenix Hacks | Final Fantasy II | Role Playing | SNES | GP | Improvement | 1.0 | 22 Mar 2008 |
| Meditatris | Deric Miller | Tetris | Puzzle | NES | G, S, L, T, GP | Improvement | 1.0 | 12 Dec 2020 |
| Mega Force | lancuster | Metal Force | Action > Platformer | NES | G, T, O | Improvement | 1.0 | 19 Oct 2016 |
| Mega Francesca | Korxtendo | Mega Man 4 | Action > Platformer | NES | G, L, T | Improvement | 1.1 | 27 Oct 2014 |
| Mega Lion | WarrantX | Mega Man 3 | Action > Platformer | NES | G, T | Complete | 1.0 | 04 Jun 2007 |
| Mega Lion II | WarrantX | Mega Man 5 | Action > Platformer | NES | G, T | Complete | 1.0 | 01 Oct 2016 |
| Mega Man - The Hedgehog Trap | za909 | Mega Man 3 | Action > Platformer | NES | G, S, L, T, GP | Complete | 1.1 | 22 Jul 2011 |
| Mega Man 2 - No Full-Screen Flashes | Tetrahedrus | Mega Man 2 | Action > Platformer | NES | O | Improvement | 1.0 | 24 Sep 2020 |
| Mega Man 2 - QoL Fixes | Ratheronfire | Mega Man 2 | Action > Platformer | NES | O | Improvement | 1.1 | 30 Oct 2020 |
| Mega Man 2 - Weapon Rebalance | Nali | Mega Man 2 | Action > Platformer | NES | GP | Improvement | 1.0 | 20 Jul 2020 |
| Mega Man 2: No Skid | FateForWindows | Mega Man 2 | Action > Platformer | NES | GP | Improvement | 1.0 | 14 Jan 2019 |
| Mega Man 2: The Revenge of the Eight Robot Masters | DurfarC | Mega Man 2 | Action > Platformer | NES | G, L, T | Complete | 1.1 | 10 Aug 2005 |
| Mega Man 3 - Ridley X Hack 1 | Ridley X | Mega Man 3 | Action > Platformer | NES | G, L | Complete | 1.1 | 02 Jun 2011 |
| Mega Man 3 - Ridley X Hack 2 | Ridley X | Mega Man 3 | Action > Platformer | NES | G, L | Complete | 1.0 | 16 Feb 2012 |
| Mega Man 3 - Ridley X Hack 3 | Ridley X | Mega Man 3 | Action > Platformer | NES | G, L | Complete | 1.2 | 09 Jun 2013 |
| Mega Man 3 - Ridley X Hack 4 (Gamma's Revenge) | Ridley X | Mega Man 3 | Action > Platformer | NES | G, L, O | Complete | 1.2 | 16 Oct 2016 |
| Mega Man 3 - Ridley X Hack 5 | Ridley X | Mega Man 3 | Action > Platformer | NES | G, L, O | Complete | 1.0 | 13 Dec 2018 |
