| Warriors of Fate: Special | KungFusedMike | Warriors of Fate | Action > Beat 'Em Up | ARC | GP | Improvement | 1.0 | 13 Feb 2023 |
| Warsaw City | Berion | Battle City | Action | NES | G, L, T | Complete | 4.5 fixed | 25 Aug 2008 |
| Warsong Graphics Hack | Jon Najar | Warsong | Strategy > Turn Based | GEN | G | Improvement | 1.0 | 01 May 2008 |
| Watatsuki no Yorihime in Streets of Rage 2 | Mystery Hacks | Streets of Rage 2 | Action > Beat 'Em Up | GEN | G, S, T | Improvement | 1.0 | 04 Nov 2017 |
| Water Mario | Eden GT | Super Mario Bros. | Action > Platformer | NES | S, L, GP | Complete | 0.9β | 02 Jul 2015 |
| Waterworld (Better Controls) | elbobelo | Waterworld (Europe) (Proto) | Action | GEN | GP | Improvement | 1.0 | 03 Mar 2022 |
| Waterworld Sound Driver Fix | LucianoTheWindowsFan | Waterworld | Action Adventure | SNES | S | Bug Fix | 1.0 | 07 Oct 2021 |
| Watts in the Haunted Forest | Kethinov | Secret of Mana | Role Playing > Action RPG | SNES | GP | Improvement | 1.3 | 29 Dec 2019 |
| Wave beam hack for MegaMan 2 | Lord J | Mega Man 2 | Action > Platformer | NES | G, GP | Improvement | 0.9 | 01 Aug 2005 |
| Wave beam hack for MegaMan 3 | Lord J | Mega Man 3 | Action > Platformer | NES | G, GP | Improvement | 1.0 | 12 Oct 2008 |
| Wayne Gretzky Hockey: Colour Team Names | NaOH | Wayne Gretzky Hockey | Sports | NES | T | Improvement | 1.0 | 23 Jan 2020 |
| Wayne Gretzky Hockey: Penalty Reduction | NaOH | Wayne Gretzky Hockey | Sports | NES | GP | Improvement | 1.0 | 23 Jan 2020 |
| WCW Master to Andre the Giant | SCD | WCW World Championship Wrestling | Sports | NES | G, T | Improvement | Final | 13 Dec 2022 |
| Weapon Speedup | Accuracy | Mega Man III | Action > Platformer | GB | GP | Improvement | 1.0 | 20 Jul 2023 |
| Weapons Factory No Battle Music | Will | Super Mario RPG: Legend of the Seven Stars | Role Playing | SNES | S | Improvement | 1.0 | 11 Jan 2023 |
| Weird Mario Bros (Graphics) | Renhoek | Super Mario Bros. | Action > Platformer | NES | G | Improvement | 1.0 | 10 Apr 2017 |
| Welcome to My Nightmare - Starring Alice Cooper | Megafield64 | The Bugs Bunny Crazy Castle | Action > Platformer | NES | G, L | Complete | 1.0 | 23 Nov 2017 |
| Wendy 2: Lost Krion/Magical Wendy | Korxtendo | The Krion Conquest | Action > Platformer | NES | G, T, O | Improvement | 1.1.3 | 31 Oct 2018 |
| Wendy: Every Witch Way - Force GBA Enhanced Mode | celebi23 | Wendy: Every Witch Way | Action > Platformer | GB | G | Improvement | 1.0 | 14 Jun 2018 |
| Werewolf the last warrior Improvement | the jabu | Werewolf: The Last Warrior | Action > Platformer | NES | G, GP, O | Improvement | 1.0 | 28 May 2023 |
