| The Terminator | pacnsacdave, 8-bit fan | Journey to Silius | Action > Platformer | NES | G, T, GP, O | Improvement | 3.0 | 12 Mar 2019 |
| Journey to Silius – Boss Run | Quest Games | Journey to Silius | Action > Platformer | NES | L, GP | Improvement | 1.3 | 25 Dec 2018 |
| Journey to Silius MMC5 Patch | Dracula X | Journey to Silius | Action > Platformer | NES | O | Improvement | 1.1 | 17 May 2020 |
| Journey to Silius Level 5 Music Replacement | NK358 | Journey to Silius | Action > Platformer | NES | S | Improvement | 1.01 | 08 Feb 2020 |
| When Mario Attacks! | Redrum | Joust | Action | NES | G | Improvement | 1.0 | 01 Aug 2009 |
| Joust (Arcade Hack) | Immutable | Joust | Action | NES | G, T, O | Improvement | 1.0 | 03 Oct 2015 |
| Kid Niki 3 MMC-3 Hack | MottZilla | Kaiketsu Yanchamaru 3: Taiketsu! Zouringen | Action > Platformer | NES | O | Improvement | 1.0 | 06 Aug 2008 |
| Ren Adventures | Roket | Kaiketsu Yanchamaru 3: Taiketsu! Zouringen | Action > Platformer | NES | G, O | Improvement | 1.0 | 03 May 2020 |
| Karate Champed | S. K. Dumbbus | Karate Champ | Action > Fighting | NES | G, T, O | Improvement | 1.0 | 26 Jan 2017 |
| Karnov - Hack by LANCUSTER | lancuster | Karnov | Action > Platformer | NES | G, L, T, GP, O | Improvement | 1.0 | 27 Jun 2016 |
| Smash Bros. | emotionengine | Kart Fighter | Action > Fighting | NES | G, T | Improvement | 1.0 | 01 Aug 2016 |
| Kart Fighter Improvement | Doomkid | Kart Fighter | Action > Fighting | NES | G | Improvement | 1.2 | 10 May 2020 |
| Sansuu 1 Toshi: Keisan Game - Kaeidzuka | DASTARD | Keisan Game: Sansuu 1 Toshi | Other | NES | G | Improvement | 1.0 | 01 Feb 2008 |
| Adoventoro Tcheco | MacBee | Kero Kero Keroppi no Daibouken 2: Donuts Ike ha Oosawagi! | Action > Platformer | NES | G, L, T | Complete | 1.0 | 21 Jul 2007 |
| Kid Icarus ZZ | Zalbag | Kid Icarus | Action > Platformer | NES | G, L, T | Improvement | 1.0 | 04 Jul 2011 |
| Kid Icarus in NES Land Journey | Redrum | Kid Icarus | Action > Platformer | NES | G | Improvement | 1.0 | 01 Aug 2008 |
| Kid Icarus - Retold | dACE | Kid Icarus | Action > Platformer | NES | G | Improvement | 1.2 (240) | 29 Mar 2014 |
| Kid Icarus MMC1 to MMC3 Hack | infidelity | Kid Icarus | Action > Platformer | NES | O | Improvement | 1.0 | 07 Jun 2015 |
| King's Quest V - SCI Font | Big Hairy Marty | King's Quest V: Absence Makes the Heart Go Yonder | Adventure | NES | G | Improvement | 1.0 | 11 Feb 2017 |
| Kirby's Adventure UFO Fix | Dizzy9 | Kirby's Adventure | Action > Platformer | NES | GP | Improvement | 1.0 | 25 Nov 2010 |
