| Ike Ike! Nekketsu Hockey 16 teams | DANGER X | Ike Ike! Nekketsu Hockey Bu: Subette Koronde Dairantou | Sports | NES | G, L, GP | Complete | 40 | 29 Jan 2016 |
| Ikari Warriors Proofread | Mister Xiado | Ikari Warriors | Action > Shooter | NES | T | Improvement | 1.0 | 30 Jul 2018 |
| Ikari III MMC1 to MMC3 | chronix | Ikari III: The Rescue | Action > Beat 'Em Up | NES | O | Improvement | 1.0 | 15 Dec 2018 |
| Ignore Defense no longer ignoring Safe and Shell | Lenophis | Final Fantasy III | Role Playing | SNES | GP | Improvement | 1.E | 19 Aug 2009 |
| Icy in Miracle World | CoachMoose | Alex Kidd in Miracle World | Action > Platformer | SMS | G, T | Improvement | 1.0 | 04 Apr 2018 |
| Ice Metal 1: Uninstall | Lunaria | Super Metroid | Action Adventure | SNES | G, L, T, GP | Complete | 1.4 | 31 Aug 2010 |
| Ice Hockey FDS to NES | Kozakurainko | Ice Hockey | Sports | NES | G | Improvement | 1.0 | 21 Feb 2006 |
| Ice Hockey - NROM to MMC3 | infidelity | Ice Hockey | Sports | NES | O | Improvement | 1.0 | 17 Sep 2013 |
| Ice Hockey - Blue Ice Edition | pshel | Ice Hockey | Sports | NES | G | Improvement | 1.1 | 06 Jun 2019 |
| Ice Cream! | el kadong | Donkey Kong | Action > Platformer | NES | G, T | Improvement | 1.0 | 17 Aug 2016 |
| Ice Climber - Evil Nana | NesDraug | Ice Climber | Action > Platformer | NES | G, L, T, GP | Improvement | 1.0 | 17 Dec 2018 |
| Ice Climber - 4 players hack ver.2 | mishra | Ice Climber | Action > Platformer | NES | GP | Complete | 2 | 26 Aug 2019 |
| Ice Climber (VS) NES-hack | Morgan Johansson | Ice Climber VS | Action > Platformer | ARC | O | Improvement | 2.2 | 11 Jan 2022 |
| ICE BALL | DANGER X | Ike Ike! Nekketsu Hockey Bu: Subette Koronde Dairantou | Sports | NES | G, S, L, T, GP, O | Complete | 2.0 | 13 May 2015 |
| Ice Age | murgatroid_79 | Awesome Possum... Kicks Dr. Machino's Butt | Action > Platformer | GEN | G, L, T, O | Complete | 1.0 | 12 Mar 2011 |
| I wanna be your friend | Jiandao | Super Mario Bros. 3 | Action > Platformer | NES | G, S, L, O | Complete | 3.0 | 11 Nov 2019 |
| I condemn thee to hell! | Lenophis | Final Fantasy III | Role Playing | SNES | GP | Bug Fix | 1.0b | 19 Jan 2010 |
| Hyrule Wars | Marcos Moutta | Bokosuka Wars | Strategy | NES | G | Improvement | 1.0 | 02 Oct 2022 |
| Hyrule Warriors | pacnsacdave | Gauntlet | Action | NES | G, T, GP, O | Complete | 1.1 | 20 Aug 2017 |
| Hyperbound | Hyperbound | EarthBound | Role Playing | SNES | G, L, T | Complete | 2.0 | 01 Jan 2007 |
