| Puyo Pop Fever Undub | jarbar3000 | Puyo Pop Fever | Puzzle | NDS | S | Improvement | 1.0 | 07 Jul 2018 |
| Puyo Pop Fever (Microphone Disabled) | RadioShadow | Puyo Pop Fever | Puzzle | NDS | O | Improvement | 1.0 | 18 Jan 2015 |
| Purple Guy | 8-NabBit | Mario Kart: Super Circuit | Racing | GBA | G, T | Complete | 1.0 | 31 Aug 2021 |
| Purgatory Mode Mod | The Komrade | Phantasy Star IV: The End of the Millennium | Role Playing | GEN | T, GP | Improvement | 1.4 | 13 Jun 2007 |
| Purgatory Double EXP and Meseta | The Komrade | Phantasy Star IV: The End of the Millennium | Role Playing | GEN | T, GP | Improvement | 1.0 | 06 Oct 2007 |
| Punch Out No TKO! | drharence | Mike Tyson's Punch Out!! | Sports | NES | GP | Improvement | 1.0 | 20 Apr 2011 |
| Punch Out Lag Fix | dougeff | Mike Tyson's Punch Out!! | Sports | NES | GP | Improvement | 1.0 | 02 Oct 2018 |
| Pumpkin Runner | Boyfrost | Lode Runner | Puzzle | NES | G | Improvement | 1.0 | 22 Oct 2020 |
| Pulseman in Streets of Rage 2 1.1 | Metal64 | Streets of Rage 2 | Action > Beat 'Em Up | GEN | G, S, O | Improvement | 1.1 | 01 Nov 2017 |
| Prototype Sprites in Final Sonic 2 | mcginnis03 | Sonic the Hedgehog 2 | Action > Platformer | GEN | G | Complete | 1.0 | 30 Sep 2020 |
| Protoman: The Red Bomber | Dragonsbrethren | Mega Man | Action > Platformer | NES | G | Improvement | 3.0 | 23 Mar 2003 |
| Protoman: The New Adventures | RomHacker | Mega Man | Action > Platformer | NES | G, S, L | Complete | 1.1 | 01 Mar 2012 |
| Proto Man VI | Nazeji | Mega Man 6 | Action > Platformer | NES | G, T | Improvement | 0.70 | 20 Jun 2016 |
| Protect/Shell Routine Mod | Pinkpuff | Final Fantasy II | Role Playing | SNES | GP | Improvement | 1.0 | 31 Dec 2008 |
| Protect and Shell Improvement | Deathlike2 | Final Fantasy II | Role Playing | SNES | GP | Improvement | 1.0a | 18 Dec 2008 |
| Proofreading Fix | HarvettFox96 | Ghostbusters | Action | NES | G, T | Improvement | 2018.07.28 | 28 Jul 2018 |
| Promotion Mario Bros. | Garuna | Super Mario Bros. | Action > Platformer | NES | G, L, T | Complete | 1.0 | 27 Aug 2004 |
| Project ZM | Cosmic | Metroid: Zero Mission | Action > Platformer | GBA | G, S, L, T, GP, O | Improvement | 0.8.2 | 06 Nov 2021 |
| Project S-11 final boss music patch | DevEd | Project S-11 | Action > Shooter | GB | S | Bug Fix | 1.1 | 28 May 2018 |
| Project RE-Quest II - Mobile Script Port and Relocalization | Choppasmith | Dragon Warrior II | Role Playing | NES | G, T | Improvement | 1.12 | 14 Jun 2020 |
