| Vs. Super Mario Bros. - Home Edition - | BMF54123 | Vs. Super Mario Bros. | Action > Platformer | NES | O | Improvement | 1.1a | 05 Mar 2021 |
| La guerra del golfo MMC-3 Hack | Wave | War in the Gulf | Action > Shooter | NES | O | Improvement | 1.0 | 16 May 2016 |
| Wario’s Woods Great Autumn Yesterday | L.Soft Hacks | Wario's Woods | Puzzle | NES | G, L | Complete | 1.0 | 03 Aug 2007 |
| Wario’s Woods Enhancer | PKMNwww411 | Wario's Woods | Puzzle | NES | G | Improvement | 1.0 | 31 Aug 2007 |
| Elders of Hyrule | Immutable | Warpman | Action | NES | G | Improvement | 1.0 | 07 May 2016 |
| Battle City 2 | Magic Team | Warpman | Action | NES | G | Improvement | 1.0 | 29 Jun 2004 |
| Wayne Gretzky Hockey: Penalty Reduction | NaOH | Wayne Gretzky Hockey | Sports | NES | GP | Improvement | 1.0 | 23 Jan 2020 |
| Wayne Gretzky Hockey: Colour Team Names | NaOH | Wayne Gretzky Hockey | Sports | NES | T | Improvement | 1.0 | 23 Jan 2020 |
| WCW Master's Original Portrait & Head | SCD | WCW World Championship Wrestling | Sports | NES | G | Improvement | Final | 29 May 2018 |
| Wheel of Fortune Gamer Edition | jeffXvX | Wheel of Fortune | Puzzle | NES | T, O | Improvement | 1.0 | 04 Nov 2018 |
| Where's Waldo Big Cursor | guitarpalooz | Where's Waldo? | Puzzle | NES | GP | Improvement | 1.0 | 07 Dec 2020 |
| Saiyuki World 2 MMC-3 Hack | MottZilla | Whomp 'Em | Action > Platformer | NES | O | Improvement | 1.0 | 11 Aug 2008 |
| Anon Gunman | Inventor | Wild Gunman | Action > Shooter | NES | G | Complete | 1.0 | 01 Jan 2000 |
| Fast Gunman | Inventor | Wild Gunman | Action > Shooter | NES | G | Complete | 1.0 | 01 Jan 2001 |
| Willow No Flash Hack | Jigglysaint | Willow | Role Playing > Action RPG | NES | G | Improvement | 1.1 | 10 Nov 2020 |
| Wit's UNROM to MMC3 | BZK | Wit's | Other | NES | O | Improvement | 001 | 04 Oct 2016 |
| Wizardry I spell disambiguation patch | Leviathan Mist | Wizardry: Proving Grounds of the Mad Overlord | Role Playing | NES | T | Improvement | 1.00 | 07 Jun 2009 |
| Wizardry - Proving Grounds of the Mad Overlord AC fix | fatboysim13 | Wizardry: Proving Grounds of the Mad Overlord | Role Playing | NES | G, GP | Bug Fix | 1.0 | 14 Dec 2013 |
| Wolverine Easy Version | MottZilla | Wolverine | Action > Platformer | NES | GP | Improvement | 1.0 | 06 Feb 2012 |
| Good Claws - Wolverine | Guyver (X.B.M.) | Wolverine | Action > Platformer | NES | GP | Improvement | 1.0 | 17 Oct 2016 |
